WOW!!! I put the 4 cycle on over the weekend and I will NEVER use another 2 cycle after seeing how smooth this 4 cycle is.....also quieter. With the 2 cycle, I had major vibration over about 15mph. The 4 cycle cruises very smooth at 30mph, which seems to be top end on my setup.... 11 tooth on the engine and 48 tooth on the wheel.
The centrifugal clutch is kinda nice also and gets rid of one lever on the handlebars.
I liked the way the 2 cycle looked on the bike and the weight was distributed much more evenly, but I am much more happy with the ride on the 4 cycle.
Seems like the 4 cycle uses a little more fuel than the 2 cycle did. I haven't rode it enough yet to see exactly how many miles I am getting per tank. Also not sure how big the tank is, at this point. It looks smaller than a 1/2 gallon, which would explain why it seems to need fuel more often.
The attached pictures show the 2 cycle version and the new 4 cycle version.
Gary