robert0762 Posted May 16, 2009 Report Posted May 16, 2009 The only num om them is 2.0 on the top and inside on the skirt the letters JNP are cast into them. R these some cheap ass pistons that r prob gonna blow apart as soon as i ride hard for a couple hours . They were in the bike when I got it I just pulled the top off today to look around Quote
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