Customizing/modding the top of the piston

Denis Zen

Active Member
Mar 30, 2021
Riding up highway 101 at sunset
I was watching a video about modifying the top of the piston and shaving the bottom edge on the intake side to maximize air flow.

The guy channeled the left and right sides and front of the piston ever so slightly. About 1/3 the thickness of the top edge above the top ring. He said it helped the transfer flow of the air fuel ports .

Has anyone attempted this and if so what is your experience with it?