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Old 06-09-2009 | 06:09 AM
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mcsquish
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Originally Posted by afm

Nitro content: 16% 20% 25% 30%
Real head clearance: 0.45mm / 0.45mm / 0.55mm / 0.65mm
Head shims: 0.40mm / 0.40mm / 0.50mm / 0.60mm

Generally on a .12 engine 0.10mm will change the compression ratio about 3/4 to 1 point.

AFM
Does this head clearance apply to all brands or is there brand specific clearances? I ask because I am wondering about a Rossi 353 '08.

Thanks
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