Hi All, Have been tweaking my motor bit by bit and have heard of the benefits of porting the larger 80cc or 66cc. I wondered if the 48cc had the same prob with the piston covering the top of the port, well i pulled the carb off and sure enough it does but by not as much as ive seen the 80cc only about 2-3mm.
So with dremel in hand i got grinding! i lowered the inlet by 3mm and widened it by more than that on both sides the exhaust i went a lil more, i only cleaned the transfer ports. Re-assembled and went for a ride.
First difference its louder! heaps!
Power wise its is a lil better down low but as reves climb and climb and climb it gets louder and smoother! it feels like it revs alot more. I know it sound dumb but it feels stronger also, like i wont blow it up .... famous last words!
i set a new top speed of 59.2kmh or 36.5mph my previous was 52kmh i use to hit it like a wall every time.
Will have to wrap better cotton insulation in the exhaust to help shut it up a bit.
Regards,
steve
So with dremel in hand i got grinding! i lowered the inlet by 3mm and widened it by more than that on both sides the exhaust i went a lil more, i only cleaned the transfer ports. Re-assembled and went for a ride.
First difference its louder! heaps!
Power wise its is a lil better down low but as reves climb and climb and climb it gets louder and smoother! it feels like it revs alot more. I know it sound dumb but it feels stronger also, like i wont blow it up .... famous last words!
i set a new top speed of 59.2kmh or 36.5mph my previous was 52kmh i use to hit it like a wall every time.
Will have to wrap better cotton insulation in the exhaust to help shut it up a bit.
Regards,
steve