657 GTX

This is my dads ski that I had to rebuild. It is a older ski and it honestly not worth the rebuild, but we decided to rebuild it anyway. we had a huge loss of compression it was only putting out 80 psi per cylinder. Now it is critical to have a good compression 120-150 is a good range. Therefore, I obviously needed to do a top end rebuild; my dad bought all the parts and I tore it apart. The pistons in there were so chewed up.Plus this motors top end was a pain to get out and even worse to get back together. I will never rebuild one of these skis; however with some dumb luck i got it all back together and got it fired up.