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Undersized Honda valve shim
Don't grind your shim! Use my undersize shim instead! Made to size, not ground or modified, this undersize shim is available in much thinner sizes than Honda supplied. Honda goes down only to 2.55 (though the service manual says 2.30, the parts catalog says 2.55). I have these in 2.20 through 2.50. Just the thing for that cylinder head that has gotten a valve job.

Early Honda DOHC fours, 1979 through 1983, and the six-cylinder CBX, 1979 through 1982.

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