Recent content by Mark513

Thanks guys, as you can see the piston is in good shape, and I have new oem rings to put in,so I should probably get one of those used ones from drf256.

Here’s a shot from the far left of the exhaust port, the left side seems ok

No pictures yet, saws at work,but you can slightly see the edge going down on stroke and then it disappears ,then on the way back up the same.. On the straight edge where wrist pin is at. Will get pictures tomorrow.

Hello OPE forum, and thanks for having me! I know the professional saw mechanics know the answer to this one. I have a nice 440 magnum, and after reading and seeing all the porting and performance threads on here decided to try it myself.. well all was goin well until I slid the cylinder...