my 8 year old cousin recently got a e-ton 80 and I decided to try it out. It was the coolest (as much fun as a 50) and it got me thinking about getting one. After researching a bit I found that the ssr/roketa 125 race atv uses a 50 backbone frame, swingarm and drivetrain. Then I thought it would be cool to deck it out with a bunch of 50 upgrades, like a 160cc GPX motor. Only if they had a class to race them.