Harbor Freight 2.5 Chopper(Need clutch/sprocket help)
I picked up a harbor freight greyhound from dirt cheap today for $42 and am searching craigslist for a occ/schwinn chopper bike. I hope to frame mount the engine with a 10t cent. clutch and sprocket on the rear wheel. I would like to eliminate the need for a jackshaft but that would mean that I would need a giant sprocket on the rear wheel, something like 70t which would give me a
7:1 ratio and 30.6mph at 3600rpm and 42.5mph at 5000 rpm (which i believe is close to the limit of this engine without the govenor) Is this realistic or am I missing something? Also I was looking to use #41 chain because of its strength, but the only 40 pitch 70t sprocket i can find is $62 before shipping!! would it be possible to use a #35 sprocket and chain or would that be too weak? I dont know how i'm going to mount the sprocket to the rear wheel, but I am considering a manic mechanic hub adapter, could jim also make me a sprocket to go with that? I also have a 2 stroke kit that doesnt run that I will be taking parts off of for this build. I will try to keep you guys updated on my progress once i get a bike. Until then I will be buying all the parts i need online.
I picked up a harbor freight greyhound from dirt cheap today for $42 and am searching craigslist for a occ/schwinn chopper bike. I hope to frame mount the engine with a 10t cent. clutch and sprocket on the rear wheel. I would like to eliminate the need for a jackshaft but that would mean that I would need a giant sprocket on the rear wheel, something like 70t which would give me a
7:1 ratio and 30.6mph at 3600rpm and 42.5mph at 5000 rpm (which i believe is close to the limit of this engine without the govenor) Is this realistic or am I missing something? Also I was looking to use #41 chain because of its strength, but the only 40 pitch 70t sprocket i can find is $62 before shipping!! would it be possible to use a #35 sprocket and chain or would that be too weak? I dont know how i'm going to mount the sprocket to the rear wheel, but I am considering a manic mechanic hub adapter, could jim also make me a sprocket to go with that? I also have a 2 stroke kit that doesnt run that I will be taking parts off of for this build. I will try to keep you guys updated on my progress once i get a bike. Until then I will be buying all the parts i need online.
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