I did a compression test on my 2003 kinetic and got only 45 psi. Took the motor out thinking it was the piston and to my surprise nothing wrong. What could it be that is causing the low compression? Another thing that was weird to me is that the cylinder has an extra hole in it as well as the head. I guess somebody was porting it or something. But I had it working for a long time and it was much faster than my Ciao.