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post #1 of 1 (permalink) Old 04-01-2019, 12:17 AM Thread Starter
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Need information about the cylinder

Ok guys I'm still stumped. when i bought the 08 kfx450 it didnt run great always needed to boost it off a vehicle cause it would drain the battery so anyways before I took it apart It had only 45 psi on stock piston shimmed it correct that still didn't build any more compression so I bought a cp 13.8.1 piston hoping that would fix it installed it and only bumped the compression up to 50 psi. So I bought the kx 450 cams put it in still nothing . So I noticed a little oil in front on top of the cases were leaking oil so pulled the motor re sealed the cases, made sure the valves are sealing and they were all good and re measured the ring gap and it was .20 or a little more that that on the feller guage so I took my mic out and mic it top of the cylinder was 55.93mm and bottom of the cylinder was 55.86mm so my question is that is the cylinder still inspec or is it worn? What are your guys cylinders measures out as? Because that is the only thing I got left that I didnt change out
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