Just got back into messing with the go kart today. Old Z car and clearing the back of the property has been my top projects lately. I put a 120 in and will try that out. Have 125-140 available in increments of 5 to try. Will report back.
Other question: do aftermarket exhausts for gy6s, which I expect to be mostly for scooters fit these karts or do you have to buy one specific to yours? Only thing Google search gave me was a hammerhead product as I recall. Something to the tune of $250, which IMO is mad for a foot or two of pipe and a little muffler.
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