View Single Post
Old 03-29-2015, 09:50 PM
mapbike's Avatar
mapbike mapbike is offline
Motorized Bicycle Elite Member
Join Date: Mar 2010
Location: Central Texas
Posts: 5,379
Default Re: what did you do to your motorized bicycle today?

Originally Posted by DRBS View Post
instead of notching the skirt try drilling 4 holes in the skirt two 31mm from bottom ring then two more at 34mm from bottom ring helps keep the integrity of the skirt
Have you done this mod?

How is someone gonna drill holes in the very small amount that doesn't clear top of intake port when piston is at TDC when usually only 1/8" - 3/16" is all that needs to be trimmed.

drilling holes above the area that usually needs trimming is gonna be a performance killer since as piston moves downward creating the primary compression that forces the air fuel mix into transfers and ultimately into combustion chamber.

Maybe I've just misunderstood,if so please explain so someone doesn't start drilling holes in the wrong place their piston and ruin the piston.
I dont always ride WOT, but when I do..I do my best to keep the rubber side down..Ride safely my friends!
Reply With Quote