black john
TY 4 Stroke Guru
porting
porting on a four stroke is not like on a two stroke. the popt timeimg in take or exh is not changed. even with cam changes the driveablity does not change.
porting on a four stroke is not like on a two stroke. the popt timeimg in take or exh is not changed. even with cam changes the driveablity does not change.
