hey guys greetings from ontario
i have a rear wheel friction drive kit on my bicycle, that came with a stock gx35 knockoff, it was underpowered and sucked, and the crank eventually snapped in half! i got 2 different pocket bikes for parts, i threw the first engine on, ran in with a 40:1 mixture, and it seemed ok, but it wasnt powerfull, eventually it lost compression and died, i pulled it apart and it was cooked, it was clearly running to lean, anyways, i have another engine i wanted to use, i took the top end off of it and tried to switch the pistons and head over, but as it turns out, one piston is much smaller than the other, i read about the 44mm pistons and the 40mm pistons, but here is where im confused, the engine i blew has 40 clearly stamped on the inside of the piston skirt, and it has an arrow on the piston, the engine i currently have on my bike has an unmarked piston, with no arrows, however its a decent size smaller than the 40mm piston, it looks just like any normal pocket bike engine from the outside, i got it all together and it runs good, but i want to prevent it from blowing, also i dont have the stock muffler, i have a canister style muffler from a 49cc piston port engine, will this work ok? and what engine do i have? do they make pocket bike engines with 35mm pistons? how many cc is this thing, if the 40mm piston was 39cc then this must be like 30cc or something, i didnt know they came this small, thanks guys!
i have a rear wheel friction drive kit on my bicycle, that came with a stock gx35 knockoff, it was underpowered and sucked, and the crank eventually snapped in half! i got 2 different pocket bikes for parts, i threw the first engine on, ran in with a 40:1 mixture, and it seemed ok, but it wasnt powerfull, eventually it lost compression and died, i pulled it apart and it was cooked, it was clearly running to lean, anyways, i have another engine i wanted to use, i took the top end off of it and tried to switch the pistons and head over, but as it turns out, one piston is much smaller than the other, i read about the 44mm pistons and the 40mm pistons, but here is where im confused, the engine i blew has 40 clearly stamped on the inside of the piston skirt, and it has an arrow on the piston, the engine i currently have on my bike has an unmarked piston, with no arrows, however its a decent size smaller than the 40mm piston, it looks just like any normal pocket bike engine from the outside, i got it all together and it runs good, but i want to prevent it from blowing, also i dont have the stock muffler, i have a canister style muffler from a 49cc piston port engine, will this work ok? and what engine do i have? do they make pocket bike engines with 35mm pistons? how many cc is this thing, if the 40mm piston was 39cc then this must be like 30cc or something, i didnt know they came this small, thanks guys!
