ryanrambo24
Member
- Jan 10, 2005
- 40
- 0
I ride a cr125 91' and i remember the first time i rebuilt my engine the previous owner had 3 holes drilled in the piston, just under the rings on the exhaust side exact middlelike where the post is on the exhaust port. I was wondering if you or anyone had ever done this or heard of it , what is this done? any other good tips for a successful top end rebuild