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xs650 > > Motorcycle Systems > > Engine > > valve clearances


valve clearances
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tweedy64
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Joined: Aug 17, 2007
Posts: 278
Location: wiltshire, England

PostPosted: August 5, 2008, 7:44 am    Post subject: valve clearances

Hi guys i know this subject has been covered a million times but would like your input on the subject, i have an 80 xs with xsperformance filters n BSA style mufflers on now my valve clearances i set per book intake 0.002 and exhaust 0.006. Was thinking of putting the intake up to 0.003. What effects would this achieve and what you guys running yours at? your opinion and expert advice always welcome. cheers tweedy xsxsxsxsxsxsxs
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xsjohn
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Joined: Jul 30, 2006
Posts: 5857
Location: North Carolina USSA

PostPosted: August 5, 2008, 7:56 am    Post subject: Re: valve clearances

.002 is too tight.....increases overlap and makes idol a bit weak....4 is right but will clatter.......3 will work on the valve tips faster than 4.......I would set it a 4 and put up with a bit of clatter.......catch 22 with these for sure....xsjohn
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tweedy64
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Joined: Aug 17, 2007
Posts: 278
Location: wiltshire, England

PostPosted: August 5, 2008, 7:58 am    Post subject: Re: valve clearances

Thanks John, how about the exhaust are they ok at 0.006 ?
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xsjohn
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Joined: Jul 30, 2006
Posts: 5857
Location: North Carolina USSA

PostPosted: August 5, 2008, 8:01 am    Post subject: Re: valve clearances

Yea........6...........xsjohn
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