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YZ426F Valve Clearance w/Mod?

This is a discussion on YZ426F Valve Clearance w/Mod? within the 4-Stroke Motorcycles - Yamaha forum, part of the 4-Stroke Motorcycle Forums category; Does anyone know if I install the '03 exhaust cam mod on my bike, will it change the factory clearances ...

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  #1  
Old 11-29-2006, 12:57 PM
basanch73's Avatar
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Usflag YZ426F Valve Clearance w/Mod?

Does anyone know if I install the '03 exhaust cam mod on my bike, will it change the factory clearances listed in the manual. I know I have to reverify them with the new cam; but will I be still checking an adjustment of .20 - .25mm on the exhaust?
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Old 11-29-2006, 07:16 PM
Keetoman393's Avatar
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Default Re: YZ426F Valve Clearance w/Mod?

The tolerances are the same. Just use the manual and keep it in spec. Welcome to ATM!
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Old 11-29-2006, 07:27 PM
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Default Re: YZ426F Valve Clearance w/Mod?

The tolerances are the same, but you will have to reshim the valves. Plan on buying a few shims.
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Old 11-30-2006, 08:58 AM
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Default Re: YZ426F Valve Clearance w/Mod?

Thanks Keetoman393 and happy riding!
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