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Too much valve clearance?

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Hello out there.  New here and new to bikes.

 

This is probably a dumb question.  I just checked and adjusted valve clearance on my 2010 KX250F.  All were in spec except the left intake valve.  it was .063mm.  Specified clearance is .10-.15mm.  Did all the math and came up with minimum shim size of 2.813 and max of 2.863.  I used a 2.80 from a hot cams kit.  New clearance was just over spec.  I put it back together happy that everything went back like it should.  In hind sight, I'm wishing I'd have used a 2.85 shim.  So I guess the question is, is too much valve clearance bad?  Or should I just tear it open again and get it right.

 

Thanks.

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Hello out there.  New here and new to bikes.

 

This is probably a dumb question.  I just checked and adjusted valve clearance on my 2010 KX250F.  All were in spec except the left intake valve.  it was .063mm.  Specified clearance is .10-.15mm.  Did all the math and came up with minimum shim size of 2.813 and max of 2.863.  I used a 2.80 from a hot cams kit.  New clearance was just over spec.  I put it back together happy that everything went back like it should.  In hind sight, I'm wishing I'd have used a 2.85 shim.  So I guess the question is, is too much valve clearance bad?  Or should I just tear it open again and get it right.

 

Thanks.

 

What size shim did you pull out of the bike?

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I don't think that tiny bit of extra will hurt. If it's not noisy, I would leave it.

 

However, I've done the same thing and after a week changed to a "perfect" shim to be safe. That was when I first bought the bike. Good practice. But again, I would probably leave it now.

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2.90

 

You will be fine.. the valve should tighten up a bit any how after it is run a little bit. check it again in a few hours if you feel the need to but it is not to far out at all. it will just be at the high end of the spec range. 

 with a .15 feeler gauge, your looking for a slight drag....  unless the feeler gauge is sloppy and slides right in, then definitely go to the 2.85 

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Ok, cracked it back open. Slight drag with the .15. All other valves still in spec. Going to call it good. Will call it a successful first try if she fires up.

Thanks for the help.

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