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PostSubject: valves    Wed Sep 11, 2013 11:57 pm

I was thinking about doing all mods but if I do will it mr to check my valve clearance more often.
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PostSubject: Re: valves    Thu Sep 12, 2013 5:56 am

Depends on what "all the mods" consist of. If you're doing head work, you'll have to do a valve adjustment then, but otherwise normal service intervals.
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PostSubject: Re: valves    Thu Sep 12, 2013 9:31 am

In my experience titanium valves tend to stretch out of adjustment more often. I ran em on one of my bikes for awhile and finally swapped em for SS ones.
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PostSubject: Re: valves    Sun Sep 22, 2013 3:43 pm

High rpm = more wear per given mile. Assuming Yamaha expected the bike to be used around town when setting the 25000 mile interval, then it wouldn't hurt to check it sooner if you are racing. Normal modifications will have no effect on valvetrain wear.
I have never done it on a bike, but shim bucket valves never get adjusted on cars unless there is head work being done anyway. I would treat my bike the same, but that's just me.
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