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250X Valves

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Well, I finally checked my valves for the first time. I only have about 300 miles on my X. They are left intake .004 and right intake .005. Thats not too bad. The exhaust are the problem. Left exhaust .0055 and the right is .006. I know they are suppose to be at .011. I am reshimming the exhaust. Thanks for the excellent post in how to shim the valves. I have the old exhaust shims out. They are left exhaust 2.58mm and right exhaust 2.52mm. My math isn't that great and the spreadsheet doesn't seem to open. What size shims do I need to order. Thanks...

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Do you have excel? It should load if you do. But you should save it to your hard drive first. But here are your numbers. I am assuming you had a typo on your left exhaust measurment and went with .005 if it really is .0055 then you need a valve...

Your new exhaust shim sizes should be

Right: SHIM, TAPPET (2.400) Part# 14949-KT7-013

left: SHIM, TAPPET (2.425) PART# 14950-KT7-013

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