You have to be careful with the 61mm bore there's 2 kinds. The first one will have a super thin piston skirt wall. The 2nd one will be a thicker skirt wall but the case has to be bored. Company name is taida that makes it. The 59mm kit your talking about is actually 58.5 piston. Guys who have it say they don't see any gain. I've seen kits that say high compression that is suppose to raise the compression 1 point. 12 gram roller would be a start so you get an idea. I always liked a A11 cam with 10 gram rollers in the yerf dog. But that was with a big valve ported head, and 31 tooth sprocket with 22 rear tires.
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Hammer head Single seater know as herbie
under construction
Aluminum fuel tank, aluminum wheels, custom fuel/cargo rack, entire rewire, trail tech vapor, ported big valve head, a12camshaft, 12 gram sliders, straight intake, kirkey wide seat, front end extension. 4 point harness, welded cage. Hammerhead exhaust.
Blade Single Seater Restore
welded cage, engine build, new wiring harness/electric box, spun aluminum fuel tank.
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