Is the huffy a 2 stroke by default? I have to know first if it's a 2 stroke huffy or a 4 stroke huffy. Lets just say there's a reason no modern cars have 2 stroke engines. I have a Huffy nel lusso I'm putting a 4 stroke on. I like the built in rack. looks pretty nice with the 49cc on it. I'd start with a 4 stroke first then select a huffy. Is it a chinese bike? the answer is yes. A 49cc huasheng with 4G clutch is pretty good engine and transmission, I didn't get the 4G though. And take some things in consideration before I get attacked. The 4 strokes don't strip out the head studs because there is none, they don't blow out the head gasket because the head is 1 piece plus they barely if ever blow out crank seals and you don't have to worry about if you have the right mixture in the gas. I think people hate on the 50's because they don't feel like doing oil changes or valve adjustments, either way who knows. I honestly wish all these 2 stroke motors had a cam and valves the same basic shape only 4 stroke. That way you'd get more reliable bikes and easier to mount. The 4 stroke mounting plates are annoying.
It all boils down to this, would you rather have a Soviet copied Chinese powerplant or a Japanese copied Chinese powerplant?