138cc flat head 4 strokeUnfortunately a whizzer is way out of my price range. I looked into getting one, and I would love to have one, but that's something future me can get.
I'm curious what performance parts you can get for those, aren't they a 4 stroke L head engine?
Basic stuff to hop up a flat head, high lift cam, bigger valves, performance lifters, high compression head. carb, bigger piston, clutch pulley ratio, and other modification tricks for the Whizzer engine