I had a Rotax once, so glad I sold it. Everything on that engine cost $500 or more. When I bought it it was legal. In the course of a year or so they came out with required changes/upgrades to the cylinder, the balance gears, the clutch, the airbox, the ignition system and some other things I can’t recall right now. It had almost zero resale value, finally found a parking lot racer and let it go for cheap. I’ve been racing kart for over 40 years, been through allot of stuff, now I run a $60 clone motor I got from Harbor Freight and loving it.
FAA certified jet engine and aircraft technician,
Nicholson Speedway class champion 2001,
Yamaha KT100 Service Center,
41 years karting experience