I like other tilders too, have a Yamaha Zuma 50cc scooter, however have installed a 75cc top end, came with
new carb, head, cylinder, piston and rings, used stock quiet muffler. Now then machine is FUN

Top end with me 220lb
before was about 40mph now it is around 55 with MUCH stronger take off, now the machine is rideable and so much fun