2006 Honda TRX680 Rincon Factory Service Manual, Page 229Get this manual
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CYLINDERPISTON
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STANDARD 102.000102.015 (4.01574.0163) 101.960101.990 (4.01424.0153) 23.00223.008 (0.90560.9058) 22.99423.000 (0.90530.9055) 0.0020.014 (0.00010.0006) 0.25