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 Post subject: Valve Clearance Question
PostPosted: Sun Apr 03, 2016 7:06 am 
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Track Day Novice

Joined: Wed Jul 24, 2013 10:53 am
Posts: 4
Hey Guys,

Anybody know if setting your valve clearance a little tighter than spec is acceptable for a track bike? I have a CBR929RR. Who would be a good person to contact on this? Thanks

Jake


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PostPosted: Sun Apr 03, 2016 7:16 am 
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Gp Racer
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Just curious, what would be your reasoning behind doing that?

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PostPosted: Sun Apr 03, 2016 8:37 am 
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Trying to avoid having to pull the camshafts to adjust the shim sizes. The exhaust valve clearance is out of spec on the tight side. I would guess the honda specs have a little bit of safety factor built in to them? Honda spec shows .27mm clearance for exhaust valves, i am currently around .19mm.


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PostPosted: Sun Apr 03, 2016 8:11 pm 
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Gp Racer
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It's not that big of a deal to pull the cams and replace the shims, especially since you are already in that far. If you're not comfortable doing it maybe you have a buddy that is? I've adjusted all my bikes a few times now. I wouldn't put it back together with them being that far out.

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PostPosted: Fri Jul 08, 2016 10:26 pm 
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I would definitely adjust your valves correctly, when valves get tight it is because of wear on the valve seat, although it is normal you can potentially lose a valve retainer and drop a valve, much easier to fix it before it becomes a problem!


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PostPosted: Sat Jul 09, 2016 1:46 pm 
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As others have said. Get it fixed right. Doesn't matter if you're using it for track duty or not.


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