[Overdriven]

Most f the homebuilts I've seen in built in this style use pocket bike parts (wheels/tires, sprockets etc). Gokart stuff would be heavier and more expensive.

The worst part is the motor choice. Depending on the blower the pullstart can be on the wrong side with no way of adapting a clutch, I had that problem with a blower I found. Blowers also usually don't have as much power, so 20-30mph with slow take off is probably going to he case. Direct drive with no clutch would make take off worse since the engine wouldnt be anywhere near the powerband at slow speeds. A clutch let's the engine rev up near or into the powerband from a stop and slow speeds. Not saying it couldn't be done, but I wouldn't invest much in it, I'm waiting for a chainsaw or weedwacker to come along before attempting my gasser project.