im thinking about modifying my piston skirt on my 70cc athena reedvalve kit. how much should i take off and what are the possible ill effects?
Athena piston skirt modification
Re: Athena piston skirt modification
I cut the skirt on it to the same level of the piston near the pin (as if the skirt wasn't there) left about 1/2" or less at the bottom of the skirt.
Not much downside to doing it, gained a bit of top end speed, didn't lose any bottom end.
The pic on the wiki shows how it should look:
Re: Athena piston skirt modification
what about booster port enlarging?
Re: Athena piston skirt modification
I enlarged mine by making 2 large ovals instead of 4 small holes. It felt like it lost a little bit of bottom end but didn't gain much. I'd just leave em alone in the future.
Want to post in this forum? We'd love to have you join the discussion, but first: