Not quite a minibike (this is an old photo), but hey, 42mph max top speed, & street legal in CT without reg or insurance... you only need a driver's license. I pulled an average of 110mpg when cruising at 28mph.
I had just under 4000 miles on this engine before the bearings finally ate themselves (cheapo-china bearings). This was an unknown 48cc (confirmed) HT (Happy Time) engine that had some mileage on it prior to my owning it. I had gone through the engine, ported, mildly polished (steel wool), & balanced the rather beefy little crank & flyweights on the lathe. Planed the head & top of the jug down, & deleted the head gasket. Cut a new squish-band on the mill. Grade 8 metric hardware throughout. Surprisingly, the old NT carburetor was dead-on with just a little fiddling.
Required 93 octane, zero exceptions. It did NOT like anything below that. I always ran it on 32:1 with Opti2 after I ran 25:1 with the cheapo-Wally-world Supertech 2-cycle oil.
The frame upon further inspection began to crack at the head-tube weld. Aluminum Huffy frame, and not worth the effort to TIG up.
hmy:
And yes, the chain tensioner was taken off shortly after the photo was taken besides it being on the wrong way in the first place (how I got it!). The stock ones suck, and I shortened the chain enough to run it without one.
It was a fun ride that was a ton of fun to buzz around on this last summer.
I had just under 4000 miles on this engine before the bearings finally ate themselves (cheapo-china bearings). This was an unknown 48cc (confirmed) HT (Happy Time) engine that had some mileage on it prior to my owning it. I had gone through the engine, ported, mildly polished (steel wool), & balanced the rather beefy little crank & flyweights on the lathe. Planed the head & top of the jug down, & deleted the head gasket. Cut a new squish-band on the mill. Grade 8 metric hardware throughout. Surprisingly, the old NT carburetor was dead-on with just a little fiddling.
Required 93 octane, zero exceptions. It did NOT like anything below that. I always ran it on 32:1 with Opti2 after I ran 25:1 with the cheapo-Wally-world Supertech 2-cycle oil.
The frame upon further inspection began to crack at the head-tube weld. Aluminum Huffy frame, and not worth the effort to TIG up.
And yes, the chain tensioner was taken off shortly after the photo was taken besides it being on the wrong way in the first place (how I got it!). The stock ones suck, and I shortened the chain enough to run it without one.
It was a fun ride that was a ton of fun to buzz around on this last summer.
