Wags
Active Member
- Local time
- 11:39 PM
- Joined
- Aug 26, 2016
- Messages
- 196
Just got done with my every engine performance mod experiment. I took 38mm stroke with zl rod China girl (because that's what I had) and added an arrow reed valve kit with keihin carb, holed piston, third transfer port, port matched intake and exhaust, sickbike expansion chamber (soon to be kx65 expansion chamber), sickbike shifter, jaguar cdi with high output coil, iridium spark plug, the two transfer ports were matched to the cylinder, 6cc fred head and was decked for .70mm squish band. After running a compresion test I found my compression to be 179psi! after dialing in the cdi and carb it runs great and has no power issues. Now that I've given all the necessary information my question is... how do i bring the compresion down without sacrificing my squish band or power? I know I'm putting horrible stress on my bearings and wrist pin and is only a matter of time before they fail. Any suggestions?