Join Date: Aug 2011
Location: southern Arizona, USA
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When I did the valves on my CB500X at nearly 15K miles, I needed to decrease the shim thickness by two sizes, i.e., by 0.05 mm. But my valve clearances were at or slightly less than the minimum allowed value.
I replaced all eight shims with ones 0.05 mm thinner.
To increase your stated thickness by two sizes you would go from 1.98 to 2.02 mm. These are actually 1.975 and 2.025 mm shims.
2.2 mm would be way too thick.
John '14CB500XA (Daily Rider), '09CRF230L (Li'l Red Piglet), '89NX250 (sold)
Propelled by Penguin Power
Nekkid motorcycles feel faster
1st bike: a gently used 1958 Matchless 250 thumper
Last edited by jsonder; 01-03-2018 at 12:08 AM.
Reason: discuss his shim size