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 Post Posted: Thu Apr 09, 2020 5:35 pm 
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Joined: Mon Jun 22, 2015 8:59 am
Posts: 3
I'm just looking at the front-end of my 900.
I have standard Showa MCZ-641 forks and I'm feeling a 'knocking' through the bars over bumps.
I'm a big fella and the front forks have always felt a little soft for me, but from what I read... that's typical of the standard shocks.

I've had the bike 5 years and not changed the fork oil (naughty me). But there's no leaks and they look to be in good condition.

1st question, would the degraded oil cause the knocking feel over bumps?

2nd question, are the standard springs linear or progressive?

3rd question, if I go for Hagon or Hyperpro progressive springs rather than standard, will that improve the handling/stop the bottoming-out?

I'm looking to fettle the whole front end, including new oil, bushing, oil seal, dust seal and headstock bearings over the cover-19 lock-down period. Going to powder coat the forks and yokes too.

4th and probably the most important question... :p Satin silver or Black? :D

Thanks in advance guys!


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 Post Posted: Thu Apr 09, 2020 6:13 pm 
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Knob Magnet
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Joined: Sun Mar 05, 2006 9:38 pm
Posts: 10285
Location: Catterick, North Yorkshire
after 5 years your fork oil will be like ditch water not oil!!
there is a chance that the bushes will need doing, but if you are taking the forks apart anyway, change everything!
stock springs are progressive.
i would check your head bearings whilst you have the front end off, they might be worn/loose causing the knock 8o
getting a set of fork springs linear or progressive matched to your weight will be a great first step to having a better front end.

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