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 Post subject: Idling Troubles...
 Post Posted: Thu May 18, 2017 9:32 am 
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Joined: Wed Mar 08, 2017 5:52 am
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Hi All,

First time post long time reader. I've been having a huge amount of trouble trying to get my bike to idle nicely. When it's cold it starts fine on full choke and I can gradually drop the choke back as it warms up to get it to idle at just under 2000rpm. Once it's been ridden and is fully warm it will sometimes idle at somewhere around 1500rpm, sometimes up around 2000rpm, and sometimes will stall when coming to a stop when I expect it to keep running!!

So far I have adjusted the throttle cable to rectify a problem with the throttle return forcing the throttle to close too far and drop the rpm. I also found the 2 inner carb - inlet boots loose so have refitted them. I thought the loose boots may have been affecting the idle speed due to an air leak. It idles better now but still is not very consistent.

Everything else about the bike is fine. Runs and revs right out to redline with no problems at all. Even when it occasionally stalls at idle a quick push of the starter and it fires straight back up, although sometimes a little throttle is required to keep it idling.

Any help/suggestions on this would be greatly appreciated ;)


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 Post subject: Re: Idling Troubles...
 Post Posted: Thu May 18, 2017 5:24 pm 
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Joined: Sat Feb 20, 2010 1:13 pm
Posts: 567
Location: Kaohsiung, Taiwan
Some ideas...
- Did you have the carbs cleaned?
- The AFR may need adjustment. Maybe it's running too rich or too lean.
- Check the 4 carbs vacuum balance.
- Check the spark plugs... maybe even coils.
- It could also be excessive carbon buildup.

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 Post subject: Re: Idling Troubles...
 Post Posted: Fri Jun 09, 2017 1:14 pm 
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Joined: Wed Mar 08, 2017 5:52 am
Posts: 6
Thankyou Borschtsch for you reply :)

I have checked the engine for carbon buildup and its clean as a whistle so am ordering a set of new plugs as a start which will be here shortly ;)

What is the recommended gap for these?


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 Post subject: Re: Idling Troubles...
 Post Posted: Fri Jun 09, 2017 6:16 pm 
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Knob Magnet
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Posts: 9421
Location: Catterick, North Yorkshire
Quote:
So far I have adjusted the throttle cable to rectify a problem with the throttle return forcing the throttle to close too far and drop the rpm.


did you not set the idle with the idle adjuster?

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 Post subject: Re: Idling Troubles...
 Post Posted: Sat Jun 10, 2017 12:34 pm 
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Joined: Wed Mar 08, 2017 5:52 am
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Yes Steve I did, when I bought the bike 3 months ago it wouldn't idle at all. Turns out the PO had it very poorly set up and the throttle wasn't even touching the stop in the closed position and the cables were way out of adjustment.

I have rectified this and now have it resting on the stop at idle but it's still not quite 100%

New plugs arrived today so just need a chance to fit them and report back ;)


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 Post subject: Re: Idling Troubles...
 Post Posted: Mon Jun 12, 2017 3:20 am 
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Hornet Warrior
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Joined: Thu May 12, 2011 4:15 am
Posts: 470
Location: Sri Lanka
ultraliner wrote:
Thankyou Borschtsch for you reply :)

I have checked the engine for carbon buildup and its clean as a whistle so am ordering a set of new plugs as a start which will be here shortly ;)

What is the recommended gap for these?


its CR8EH, original gap is fine.. no need to adjust
what i have is CR9EHIX-9 Iridium, 7 years.. no problem at all
try some good grade of gasoline eg. 95 Octain
clean plugleads etc


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 Post subject: Re: Idling Troubles...
 Post Posted: Mon Jun 12, 2017 3:28 am 
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Hornet Warrior
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Joined: Thu May 12, 2011 4:15 am
Posts: 470
Location: Sri Lanka
Try this

KANE wrote:
nope
new bat. not new but clean iridiums and choke was fine :clap


======>>>>> >>> >> > Solution :mic
Thanks for Internet :clap
let me Share what i just did,

1. take all pulgs out, clean them (no need to burn their tips) and do not install
2. Disconnect the main fuel line (goes from tank to carbs)
3. Disconnect the other valve(small) goes out from the fuel tap and close/block it with a small screwdriver or nut(don't let air go in)
4. extra: i also cleaned all plug wires, disconnected from plugtops and clean the end of wire or you can cut 2, 3mm from the end of the wire
5. this is important, while plugtops hanging out of the engine, start your engine 8-10 times :puke
6. install plugs, plugtops, fuel line.. everything..
7. start your engine :hat

after this i found my bike start early in the morning without choke.... it doesn't die, i keep 1min or 2 idle then everything fine
it's like new life in the bike... i think clean plug wires did the trick

cheers!


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