Register    Login    Forum    Search    FAQ

Board index » Hornet 250 » General chat




Post new topic Reply to topic  [ 56 posts ]  Go to page 1, 2  Next
Author Message
 Post subject: 19,000rpm
 Post Posted: Wed Aug 04, 2010 5:26 am 
Offline
Moderator
User avatar

Joined: Sat Feb 20, 2010 1:13 pm
Posts: 577
Location: Kaohsiung, Taiwan
Recently I found this video on YouTube, which shows a Hornet 250 running with the CDI/ECU (?) of the MC22 CBR250RR. The engine revs up to 19,000rpm!

So I was wondering what would be the minimum required changes, to rev a standard Hornet 250 MC14E engine that high? Is it a simple swap of the ECU to change the rev limit? Or would it require different cams and a different ignition system too? In the video a different set of carburetors is also used. But I assume that would not be essential, because afaik the CBR250RR has the same carbs as the Hornet.

_________________
Image
A redline a day keeps carbon away.

Image


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Fri Aug 06, 2010 12:07 pm 
Offline
Wannaprilia
User avatar

Joined: Tue Aug 12, 2008 7:36 pm
Posts: 1646
Location: nottingham
not sure on this, but surely its set at a limit for a reason?
why would you want to take it that high??

_________________
I've always thought supermarket shopping trollies should come with renthals, soo much more comfy, plus its something to keep you busy whilst being dragged around by the missus.


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Fri Aug 06, 2010 5:49 pm 
Offline
Moderator
User avatar

Joined: Sat Feb 20, 2010 1:13 pm
Posts: 577
Location: Kaohsiung, Taiwan
dudeskin wrote:
not sure on this, but surely its set at a limit for a reason?
why would you want to take it that high??

For a little more power perhaps?! :D
The CBR250RR had 45HP in her best days. As far as I know that was limited to 40HP on the Hornet to follow Japanese law restrictions... maybe tougher emissions standards too... and it was retuned to give a little bit more low-end torque.

_________________
Image
A redline a day keeps carbon away.

Image


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Sun Aug 08, 2010 10:48 am 
Offline
Wannaprilia
User avatar

Joined: Tue Aug 12, 2008 7:36 pm
Posts: 1646
Location: nottingham
fairy snuf. just thought, im thinkin of the 600, so i dont know how close the 250 is to that in the first place. doh!

_________________
I've always thought supermarket shopping trollies should come with renthals, soo much more comfy, plus its something to keep you busy whilst being dragged around by the missus.


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Mon Aug 09, 2010 1:32 am 
Offline
Moderator
User avatar

Joined: Sat Feb 20, 2010 1:13 pm
Posts: 577
Location: Kaohsiung, Taiwan
dudeskin wrote:
i dont know how close the 250 is to that in the first place. doh!
The 250 normally revs to a redline of 16,000rpm. The CBR250RR has a redline of 19,000. But I read somewhere that the same engine was capable of up to 23,500 or 24,000rpm in race bikes, although I don't know what kind of mods were done to these. The sound must be incredible! :D

_________________
Image
A redline a day keeps carbon away.

Image


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Thu Aug 12, 2010 11:16 am 
Offline
Hornet Pilot

Joined: Wed Jun 16, 2010 8:31 am
Posts: 95
Location: Hamilton, New Zealand
well here is your day gentlemen i know how to remove your restriction on your hornets:) they have 3 systems, if your keen just ask:) there is 1 in ur speedo control housing , 1 in ur ecu/cdi pack and 1 in exhaust.

_________________
SpAzTeK
Chaos on 2 wheels


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Thu Aug 12, 2010 12:44 pm 
Offline
Moderator
User avatar

Joined: Sat Feb 20, 2010 1:13 pm
Posts: 577
Location: Kaohsiung, Taiwan
Spaztek69 wrote:
if your keen just ask:)

well then... would you please provide some more details? ... maybe a website link or whatever knowledge base you would like to share? ... please please :)
So then you say it is just more or less an electronic limitation, and no physical change/upgrade to the engine would be needed?

_________________
Image
A redline a day keeps carbon away.

Image


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Fri Aug 13, 2010 3:31 pm 
Offline
Newbie

Joined: Fri May 14, 2010 10:16 am
Posts: 17
Location: Adelaide, South Australia
Oh yes, please do contribute. For those of us too pore to upgrade, but off our restricted licenses, it would be nice to get a bit more out of an awesome bike :)

_________________
<Aussie> I was listening to some girls talking in a video store.
<Aussie> And one of them was saying that she had failed her learners permit because she had used both hands to change gears.


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Mon Aug 16, 2010 5:38 pm 
Offline
Hornet Warrior
User avatar

Joined: Wed Jun 14, 2006 6:57 pm
Posts: 234
Spaztek69 wrote:
if your keen just ask:) there is 1 in ur speedo control housing , 1 in ur ecu/cdi pack and 1 in exhaust.


Is this based on any direct experience of the Hornet 250?

The restriction(s) you mention are certainly applicable to some of the 400cc Japanese domestic market bikes which were 'limited' to a top speed of 180 KMH.

On my VFR 400R you can see part of the restrictor mechanism in the speedo if dismantled.

The Hornet 250 is in a different state of tune to the CBR250-RR right down to the camshaft profiles/timing (engine is packaged differently from the very similar Jade 250)

I know the Hornet 250 well and cannot agree with your statement


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Thu Aug 19, 2010 1:33 pm 
Offline
Hornet Pilot

Joined: Wed Jun 16, 2010 8:31 am
Posts: 95
Location: Hamilton, New Zealand
floydy wrote:
Spaztek69 wrote:
if your keen just ask:) there is 1 in ur speedo control housing , 1 in ur ecu/cdi pack and 1 in exhaust.


Is this based on any direct experience of the Hornet 250?

The restriction(s) you mention are certainly applicable to some of the 400cc Japanese domestic market bikes which were 'limited' to a top speed of 180 KMH.

On my VFR 400R you can see part of the restrictor mechanism in the speedo if dismantled.

The Hornet 250 is in a different state of tune to the CBR250-RR right down to the camshaft profiles/timing (engine is packaged differently from the very similar Jade 250)

I know the Hornet 250 well and cannot agree with your statement


I am in the process of putting a turbo on my honda hornet cb250fy, ive been researching and cutomising/rebuilding my bike for last year and half, you are right there is a restrictor in the speedo and its hooked into the cdi pack, if you find the cutout wire inside the speedo and trace it back to the cdi/ecu and remove it from the sytem by earthing it then it removes its restriction, ive sent it into auto sparkeis 4 times because i changed to a cbr250rr cdi pack (supplied by studrico:). and also there are sleeves in your exhaust at the engine side of the exhaust, if u take off your exhaust you will see it is downsized sleeved and that restricts it, as i have had my whole exhaust system done by a racing exhaust specialist for motorcycles. as for the tuning you are correct it is set for low end torque that is y they restricted the system in the first place, because im putting a turbo on the bike y would i want restrictors in my system?, as for the cams yes they are set up diff to cbr250rr but where is the fun in anything if we dont have a play around:)
floydy i may post sum pics up on my topic "1st ever attempt at installing a turbo into a 250 hornet"
btw floydy any and all advice would be appreciated:) on any subject of our beautiful machines:D:D

_________________
SpAzTeK
Chaos on 2 wheels


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Fri Aug 20, 2010 1:12 am 
Offline
Moderator
User avatar

Joined: Sat Feb 20, 2010 1:13 pm
Posts: 577
Location: Kaohsiung, Taiwan
Spaztek69 wrote:
... there is a restrictor in the speedo ... i changed to a cbr250rr cdi pack ... there are sleeves in your exhaust ... as for the cams yes they are set up diff to cbr250rr

As I do not use the original speedo anymore, this kind of restriction should be gone, right?
I'm still using the original CDI pack.
I have a custom center pipe and Termignoni can on my exhaust. So where exactly are these restrictors? If they are not inside the downpipes, then this kind of restriction should also be gone on my bike.
And the cams on my bike are also original, as far as I know.

So I guess there is still no other way to get those 19,000rpm without exchanging the CDI and cams?!
Btw. would the CBR250RR CDI pack change the ignition timing and/or anything else? Who knows details of the differences?

_________________
Image
A redline a day keeps carbon away.

Image


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Fri Aug 20, 2010 2:15 am 
Offline
Forum Police

Joined: Tue Mar 16, 2010 10:14 pm
Posts: 619
Location: Weymouth, Uk
would it not be easier to drop a a CBR250RR engine into it?

_________________
98' 600 Project


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Fri Aug 20, 2010 2:20 am 
Offline
Moderator
User avatar

Joined: Sat Feb 20, 2010 1:13 pm
Posts: 577
Location: Kaohsiung, Taiwan
Digitalize wrote:
would it not be easier to drop a a CBR250RR engine into it?

Hm, sure... but first you would have to find one in good working condition.
Secondly it might be quite a bit more expensive to do such major modification.
But well... I keep on looking for one... not very urgently though! :p

_________________
Image
A redline a day keeps carbon away.

Image


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Fri Aug 20, 2010 8:52 am 
Offline
Hornet Pilot

Joined: Wed Jun 16, 2010 8:31 am
Posts: 95
Location: Hamilton, New Zealand
Borschtsch wrote:
Spaztek69 wrote:
... there is a restrictor in the speedo ... i changed to a cbr250rr cdi pack ... there are sleeves in your exhaust ... as for the cams yes they are set up diff to cbr250rr

As I do not use the original speedo anymore, this kind of restriction should be gone, right?
I'm still using the original CDI pack.
I have a custom center pipe and Termignoni can on my exhaust. So where exactly are these restrictors? If they are not inside the downpipes, then this kind of restriction should also be gone on my bike.
And the cams on my bike are also original, as far as I know.

So I guess there is still no other way to get those 19,000rpm without exchanging the CDI and cams?!
Btw. would the CBR250RR CDI pack change the ignition timing and/or anything else? Who knows details of the differences?


There is a single wire that comes out of the cdi to the speedo, when you get to top speed it sends a signal to cdi and cuts out ignition, if you have an aftermarket speedo it is quite possible that is has been removed already except that sensor wire has to be earthed, the front section of you exhaust the section that bolts to the engine if you take that off and have a look down each of the 4 exhaust pipes you will instantly see that is is restricted with a sleeve, now there can be bonuses or downfalls with removing this restrictor because you still need some form of back pressure so if you do be very careful if u have aftermarket can and you may not built up enough exhuat pressure, the research ive done so far states that the cams can handle at least 20,000 rpm in the hornets while the cbr250rr cams can handle up to 23,500 24,000 rpm. al we are all bike nuts in the long run all im doing is advising what you can try its up to each person to take it as adive or critism. as i learn more about our beloved machines i will post it up. :) oh and also the bike has a throttle responce sensor on side of carbies, ive read rumours that this is also another restirctor and the cdi works it out, yet that is to be confirmed if it is true.

_________________
SpAzTeK
Chaos on 2 wheels


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Fri Aug 20, 2010 8:59 am 
Offline
Hornet Pilot

Joined: Wed Jun 16, 2010 8:31 am
Posts: 95
Location: Hamilton, New Zealand
Borschtsch wrote:
So I guess there is still no other way to get those 19,000rpm without exchanging the CDI and cams?!
Btw. would the CBR250RR CDI pack change the ignition timing and/or anything else? Who knows details of the differences?



this area is a little grey for me as im still understanding how the system works as i go, i had help from studrico in auz and he was kind enough to test the cbr250rr cdi in his own hornet before he posted me the cdi and harness free of charge(cheers 4 dat 2 mate:) im taking the bike to auto sparky again tomorrow morning to find out timing of spark is right for compression, because studrico happily ran his bike with the cbr250 cdi pack whats to say it sholdnt work on mine? anyone up for debate on this as all info would be appreciated. I HAVE 1 WEEK LEFT TO GET HER RUNNING FOR THE NATIONAL COLD KIWI MOTORCYCLE RALLY IN NZ, so getting desperate for advise from anyone willing to give me some:)

_________________
SpAzTeK
Chaos on 2 wheels


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Fri Aug 20, 2010 9:03 am 
Offline
Hornet Pilot

Joined: Wed Jun 16, 2010 8:31 am
Posts: 95
Location: Hamilton, New Zealand
i just remembered as well that the cam lobe hights are set diff between the hornet and the cbr250, and timing is slightly advanced, from what i can see that the system is taking of the earlier jade models and used in a cbr engine, tell me if this is wrong?

_________________
SpAzTeK
Chaos on 2 wheels


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Fri Aug 20, 2010 2:18 pm 
Offline
Moderator
User avatar

Joined: Sat Feb 20, 2010 1:13 pm
Posts: 577
Location: Kaohsiung, Taiwan
Spaztek69 wrote:
There is a single wire that comes out of the cdi to the speedo, when you get to top speed it sends a signal to cdi and cuts out ignition ... that sensor wire has to be earthed, ... cams can handle at least 20,000 rpm in the hornets ... throttle responce sensor on side of carbies, ive read rumours that this is also another restirctor and the cdi works it out

OK, I have had my bike to top speed a while ago. At the time it was still with the original speedo, but it didn't sound like the iginition cut out. The original speedo indicated something in the neighbourhood of 220km/h, which is quite impossible! The Veypor unit which I had also installed and set up to my wheel size, indicated about 175km/h if I remember correctly. How much should that "cut out speed limit" be anyway? I didn't ground any wire, maybe that was done inside the CDI pack already?

Thanks for the info with the 20,000rpm cams! At least this gives some hope! :D

That "throttle response sensor" on the carbies is as far as I know some sort of "knock sensor" to retard ignition timing when engine knocking is detected, or a "throttle position sensor". But anyway, it was just dangling around near the air inlet on my bike when I got it. As I did not notice any problems, I took it off completely.

_________________
Image
A redline a day keeps carbon away.

Image


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Fri Aug 20, 2010 6:06 pm 
Offline
Moderator
User avatar

Joined: Sat Feb 20, 2010 1:13 pm
Posts: 577
Location: Kaohsiung, Taiwan
Spaztek69 wrote:
... i had help from studrico in auz and he was kind enough to test the cbr250rr cdi in his own hornet before he posted me the cdi and harness free of charge(cheers 4 dat 2 mate:) im taking the bike to auto sparky again tomorrow morning to find out timing of spark is right for compression, because studrico happily ran his bike with the cbr250 cdi pack whats to say it sholdnt work on mine?

Once you have the bike up and running with that CBR250RR CDI and harness, please let us know how it works? Does it by any chance rev up to 19,000~20,000rpm then?? :D

_________________
Image
A redline a day keeps carbon away.

Image


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Sat Aug 21, 2010 6:31 am 
Offline
Hornet Pilot

Joined: Wed Jun 16, 2010 8:31 am
Posts: 95
Location: Hamilton, New Zealand
Borschtsch wrote:
Spaztek69 wrote:
... i had help from studrico in auz and he was kind enough to test the cbr250rr cdi in his own hornet before he posted me the cdi and harness free of charge(cheers 4 dat 2 mate:) im taking the bike to auto sparky again tomorrow morning to find out timing of spark is right for compression, because studrico happily ran his bike with the cbr250 cdi pack whats to say it sholdnt work on mine?

Once you have the bike up and running with that CBR250RR CDI and harness, please let us know how it works? Does it by any chance rev up to 19,000~20,000rpm then?? :D


haha ive just had the best luck and she fired up today, got a small prob with turbo spinning(may b bent shaft or bearing, not too worried0 so honda hornets RUN with cbr250rr cdi packs, the cdi pack i recieved had a prob with tacho output so i wont be able to tell you revs untill i get another cdi with working output 4 tacho. so tempted to put video of it first fire on now but am going away for weekend so will put up monday.

_________________
SpAzTeK
Chaos on 2 wheels


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Sat Aug 21, 2010 6:36 am 
Offline
Hornet Pilot

Joined: Wed Jun 16, 2010 8:31 am
Posts: 95
Location: Hamilton, New Zealand
Borschtsch wrote:
Spaztek69 wrote:
There is a single wire that comes out of the cdi to the speedo, when you get to top speed it sends a signal to cdi and cuts out ignition ... that sensor wire has to be earthed, ... cams can handle at least 20,000 rpm in the hornets ... throttle responce sensor on side of carbies, ive read rumours that this is also another restirctor and the cdi works it out

OK, I have had my bike to top speed a while ago. At the time it was still with the original speedo, but it didn't sound like the iginition cut out. The original speedo indicated something in the neighbourhood of 220km/h, which is quite impossible! The Veypor unit which I had also installed and set up to my wheel size, indicated about 175km/h if I remember correctly. How much should that "cut out speed limit" be anyway? I didn't ground any wire, maybe that was done inside the CDI pack already?

Thanks for the info with the 20,000rpm cams! At least this gives some hope! :D

That "throttle response sensor" on the carbies is as far as I know some sort of "knock sensor" to retard ignition timing when engine knocking is detected, or a "throttle position sensor". But anyway, it was just dangling around near the air inlet on my bike when I got it. As I did not notice any problems, I took it off completely.

we have a steel hil in our country and you can get up really fast down it, with a tailwind and full tit i got off the clock just so just over 180kmhrs, 175kmhrs sounds right, i was in 6th gear it felt like she could pull more but it was like she wasent geting gas or spark, the throttle position sensor is designed to help the cdi pack determine when to fire or delay the spark to the engine depending on wat speed ur doing, this can be confirmed if you do some research on the carbies and cdi pack, if anything it will be slighty less responsive than other hornets because the signal form the throttle responce is wrong. thats my theory anyways

_________________
SpAzTeK
Chaos on 2 wheels


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Sat Aug 21, 2010 8:59 am 
Offline
Hornet Warrior
User avatar

Joined: Wed Jun 14, 2006 6:57 pm
Posts: 234
• I have a set of downpipes from a Hornet 250FT - there are no washers or collars inside the down pipes
• The Speedo does not have a sensor that reads 180KPH and cuts the revs like the domestic market VFR400R has (removing the speedo would have the same effect)

The CB250F stays within the 180KPH limit by design (MC14 engine), so de-restriction is not required
Differences between the CB250F and CBR250RR are found with the cams, CDI/ECU/ignition and gears - The 250RR was designed to run beyond 180KPH then restricted


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Sun Aug 22, 2010 3:06 am 
Offline
Moderator
User avatar

Joined: Sat Feb 20, 2010 1:13 pm
Posts: 577
Location: Kaohsiung, Taiwan
Spaztek69 wrote:
... so honda hornets RUN with cbr250rr cdi packs ...

So something like this eBay item would work on the Hornet 250 without any problems?

_________________
Image
A redline a day keeps carbon away.

Image


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Sun Aug 22, 2010 6:12 am 
Offline
Hornet Warrior
User avatar

Joined: Wed Jun 14, 2006 6:57 pm
Posts: 234
Borschtsch wrote:
Spaztek69 wrote:
... so honda hornets RUN with cbr250rr cdi packs ...

So something like this eBay item would work on the Hornet 250 without any problems?


The endorsement in that auction listing reads:

"I installed this CDI on my Honda NC23 3 months ago, My bike could run the Max KM around 120 KM before,
after that my bike can run around 160KM on road without any problem, i almost lose my lience man. The responding time brings me extra 20% of orignal CDI,"


120KPH before and 160KPH after?

That is a typo or a slow CBR400 (not the 250)


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Sun Aug 22, 2010 6:23 am 
Offline
Moderator
User avatar

Joined: Sat Feb 20, 2010 1:13 pm
Posts: 577
Location: Kaohsiung, Taiwan
floydy wrote:
120KPH before and 160KPH after?
That is a typo or a slow CBR400 (not the 250)

I think this is a general reference to any other bike than a Hornet 250, because the seller seems to offer those CDI packs for a number of different bikes.

_________________
Image
A redline a day keeps carbon away.

Image


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Tue Aug 24, 2010 8:29 am 
Offline
Hornet Pilot

Joined: Wed Jun 16, 2010 8:31 am
Posts: 95
Location: Hamilton, New Zealand
Borschtsch wrote:
Spaztek69 wrote:
... so honda hornets RUN with cbr250rr cdi packs ...

So something like this eBay item would work on the Hornet 250 without any problems?



I do not know if that custom cdi pack would work on the honda hornets, 1 thing i definatly know its that with slight rewiriing(they have same amount of wires) a honda hornet WILL run with a cbr250rr pack,

IT IS ALL TRIAL AND ERROR

we will never know until someone trys it first....correct??? just because someone tells you it cant be done doesnt mean they are right, we all have opinions. when i first started my project i was told i was nuts and not to bother doing so much work to such a small machine.... F them. creativity is endless, just as long as you do as much research as you can get facts and opinions and go from there. i would sugest you find out a bit more about the packs b4 getting them.

_________________
SpAzTeK
Chaos on 2 wheels


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Tue Aug 24, 2010 1:06 pm 
Offline
Moderator
User avatar

Joined: Sat Feb 20, 2010 1:13 pm
Posts: 577
Location: Kaohsiung, Taiwan
Spaztek69 wrote:
IT IS ALL TRIAL AND ERROR ... just because someone tells you it cant be done doesnt mean they are right ... creativity is endless ... i would sugest you find out a bit more about the packs b4 getting them.

You are absolutely right! People here are also asking me the same all the time, why I put so much effort in that little machine, why not getting a bigger one?! But for me this little insect is just right and a lot of fun! (at least for now :lol and for Taiwan anyways... bikes are not allowed to use freeways/motorways at all here ... so why bother with such a big, heavy and expensive machine?!)
Recently I also found a HRC CDI pack for the Hornet 250 on a Taiwanese auction website. But it's rather expensive and I'm not quite sure if this thing is bogus or what?! ... anyway, it's not very urgent... and just for the fun of it! ;) More urgently I need a new rear tyre ... yesterday I saw some blank metal wire at the center area! :S

_________________
Image
A redline a day keeps carbon away.

Image


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Tue Aug 24, 2010 1:35 pm 
Offline
Hornet Pilot

Joined: Wed Jun 16, 2010 8:31 am
Posts: 95
Location: Hamilton, New Zealand
Borschtsch wrote:
Spaztek69 wrote:
IT IS ALL TRIAL AND ERROR ... just because someone tells you it cant be done doesnt mean they are right ... creativity is endless ... i would sugest you find out a bit more about the packs b4 getting them.

You are absolutely right! People here are also asking me the same all the time, why I put so much effort in that little machine, why not getting a bigger one?! But for me this little insect is just right and a lot of fun! (at least for now :lol and for Taiwan anyways... bikes are not allowed to use freeways/motorways at all here ... so why bother with such a big, heavy and expensive machine?!)
Recently I also found a HRC CDI pack for the Hornet 250 on a Taiwanese auction website. But it's rather expensive and I'm not quite sure if this thing is bogus or what?! ... anyway, it's not very urgent... and just for the fun of it! ;) More urgently I need a new rear tyre ... yesterday I saw some blank metal wire at the center area! :S

hahaha i was told the same thing.... well gues what to those people who told me i couldnt do it.... i WILL have the first turboed 250 motorbike in the world and DAMN STRAIGHT she is gna b a hornet:)

New Zealand is alot more lenient for motorcycles, we can sit a test then go slap a L plate on bike and ride on any road any vehicle is allowed on, but the beauty of a 250 as my mate who had hyabusa found out, i can throw my gurl around the windy roads like it was a feather, as he had so much problems getting his 300kg bike down, on a straight road he would blast me, but through our fav gorge i was at least 5 mins ahead of him, and it made him realise that bigger engine just means more weight to throw around, ive added about 15kgs to mass of bike and balanced it, and all this work is cause i wanted to try it then found out im the first. so dont let anyone stop you from being different:)

i was doing research on cdi packs before i taked to studriico and i found bugger all custom cdi packs that could work with a 250, due to the custom setup of the engine(i.e ammount of wires and setup). but our beautiful engine have come from bolarus(duno if i spelt that right) and cbrs, may have diff cams or 1 more gear or diff ratios but it has same principals that hasnt changed throught whole hornet history so i sugest you find out exactly what designs they took off for the hornet and have a look arounnd for another cdi that may b compatable for what you want to do, i found that the cbr250rr will work well with turbo because i might change my cams to see what i can get out of engine, another thing i did as well was get a hold of my autospaky and had a chat to him to explain what to look for.



as for your tire....NAUGHTY lol u have less than inch of traction on roads with rear tire, so make sure u got control before you start modding it, i just suggest to test every step of way and try and do it so you can undo it if it doesnt work(done that a few times) ive got perelli diablos dual compound on my rear and ive noticed it lasts alot longer and still gives me that stick to the road feeling, so just have a look around at the new developments and go from there:)

_________________
SpAzTeK
Chaos on 2 wheels


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Wed Sep 29, 2010 5:10 am 
Offline
John Travolta (Are you Dancin'?)

Joined: Mon Aug 21, 2006 7:42 pm
Posts: 1881
Did someone mention turbo.....pics and video please!

_________________
Image


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Thu Oct 21, 2010 3:07 am 
Offline
Hornet Baby

Joined: Tue Oct 20, 2009 12:16 pm
Posts: 30
Location: Australia
I can say for a fact that I can swap over a CDI unit from a CBR250RR straight into my hornet loom and it starts and runs.

I also have spare CBR250RR cams that I could fit, but if I did that I may loose what the Hornet 250 is all about.

I've owned about CBR250's (still have about 10) and the hornet is a much nicer bike to ride around town.

Nice usable torque mid range compare to the CBR.

It would be interesting to fit the cdi and take it for a spin though. My tach is aftermarket and only revs to 16,000 rpm.

_________________
Cooling System o-ring kits for Hornet 250

http://www.hondahornet.co.uk/messageboa ... 543#153543


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Fri Feb 04, 2011 1:23 pm 
Offline
Newbie

Joined: Sat Dec 12, 2009 5:41 pm
Posts: 12
Location: Japan
Spaztek69 wrote:
i WILL have the first turboed 250 motorbike in the world and DAMN STRAIGHT she is gna b a hornet:)


Don't mean to rain on your parade, but there other turbo 250s out there:

Image

Good luck with your project, though. Keep us updated. :)


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Sun Oct 30, 2011 11:20 am 
Offline
Hornet Warrior
User avatar

Joined: Thu May 12, 2011 4:15 am
Posts: 474
Location: Sri Lanka
i had nothing to do so i removed that speedo meter cup, there in RPM section i have found a Wire (same color and same stripe) goes to the CDI, i am not sure is it the same restriction wire we talking about...

any one got info about it, what if i cut it and earthed? i really don't wanna blow up my CDI you know lol :help


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Sun Oct 30, 2011 12:22 pm 
Offline
Hornet Warrior

Joined: Sat Jun 18, 2011 4:41 pm
Posts: 448
Location: swansea
i replaced the cams and cdi on my zrx and had to put the double valve springs
as it reved higher to stop the valves hitting the piston
may want to check that out see if its the same on the hornet

_________________
1998 (R) Hornet (misses bike)
2000 (W) ZRX1100


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Mon Oct 31, 2011 4:49 am 
Offline
Hornet Warrior
User avatar

Joined: Thu May 12, 2011 4:15 am
Posts: 474
Location: Sri Lanka
one of my friends asked me to call someone know these stuff so i called an electrical mechanic who does electrical stuff in motorbikes mostly
according to his knowledge, he thinks we can go upto 18,000 19,000 RPM anytime when we ride. i said no, even in 6th gear it's hard to reach 17,000RPM then he said if that's the problem you should check your bike, carbs. you should have fuel problems then he asked me that i had closed any Petrol valve :lol i was speechless... this is what happened when you get advice from some sorry ass noobs.
electrical mechanic my ass :rollin


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Sun Sep 09, 2012 6:07 am 
Offline
Moderator
User avatar

Joined: Sat Feb 20, 2010 1:13 pm
Posts: 577
Location: Kaohsiung, Taiwan
Okay, as the video linked in the first post of this topic seems to be down, here is another one which shows a Hornet 250 with a CBR250R(R) CDI pack installed on a dyno. He seems to claim 42rwhp.


As I have recently installed a custom CDI pack on my Hornet, I think I'm close to my goal of 19000rpm as well. In fact I might be there already, but I'm battling slight issues with the correct indication of the revs on my Koso RX2-N dash. I'm working on solving these issues and might be uploading a small video soon too.

_________________
Image
A redline a day keeps carbon away.

Image


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Sat Sep 29, 2012 6:52 am 
Offline
Moderator
User avatar

Joined: Sat Feb 20, 2010 1:13 pm
Posts: 577
Location: Kaohsiung, Taiwan
OK, the issue with the rpm display seems to be solved.
So here is the video... and this confirms what I suspected, that I can reach more than 19,000rpm with the new CDI pack. Crazy thing! ;) The bike picks up power much better from as low as 3000rpm.


Image

Sorry for the "static bike" video. I'll try to shoot another one with my helmet camera anytime soon.

_________________
Image
A redline a day keeps carbon away.

Image


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Sat Sep 29, 2012 10:05 am 
Offline
Hornet Warrior
User avatar

Joined: Sun Jun 24, 2012 8:37 pm
Posts: 152
Location: Stroud / Fareham
WOW- thats impressive, good job man, maybe you should start selling these custom CDI packs?? :Lick

_________________
"Four wheels moves the body...Two wheels moves the soul" :)


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Sat Sep 29, 2012 10:12 am 
Offline
Moderator
User avatar

Joined: Sat Feb 20, 2010 1:13 pm
Posts: 577
Location: Kaohsiung, Taiwan
Hornet250 wrote:
WOW- thats impressive, good job man, maybe you should start selling these custom CDI packs?? :Lick

Sure, I could do that. :) please contact me if you are interested. I can organise more of those CDIs with either connection plug.

_________________
Image
A redline a day keeps carbon away.

Image


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Mon Apr 15, 2013 3:51 pm 
Offline
Newbie

Joined: Thu Mar 21, 2013 11:19 am
Posts: 19
Hi guys! I just installed the Honda CBR250RR cdi unit in my Hornet 250.
It makes a lot of difference! Seems that the bike revs much more quick and faster :)

But... It only makes 12.000 rpm. I thought that it'll make 19.000 rpm? What's wrong?

Thanks a lot!


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Mon Apr 15, 2013 5:38 pm 
Offline
Moderator
User avatar

Joined: Sat Feb 20, 2010 1:13 pm
Posts: 577
Location: Kaohsiung, Taiwan
NunoM wrote:
But... It only makes 12.000 rpm. I thought that it'll make 19.000 rpm? What's wrong?

Hard to tell with so little information. Could you by any chance upload a little video clip with sound to YouTube or something ?

_________________
Image
A redline a day keeps carbon away.

Image


Top 
 Profile  
 
 Post subject: Re: 19,000rpm
 Post Posted: Tue Apr 16, 2013 3:21 pm 
Offline
Newbie

Joined: Thu Mar 21, 2013 11:19 am
Posts: 19
Hi! It's difficult to put some youtube video, because it only limits the revs on 11,700 / 12,000 rpm when the bike is running.
It's like this, but when running
http://www.youtube.com/watch?v=a1-PRRjjGHI

When it's stop and I rev, it makes all the rotation.

It's very strange, isn't it?
I wish you could help me. I already check all the plugs and they're fine.

Thanks


Top 
 Profile  
 
Display posts from previous:  Sort by  
 
Post new topic Reply to topic  [ 56 posts ]  Go to page 1, 2  Next

Board index » Hornet 250 » General chat


Who is online

Users browsing this forum: No registered users and 2 guests

 
 

 
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to: