The most popular Vertemati Supermoto engines are the 450, 501 and the 570. The SOHC motors use gear-driven cams, rather than a camchain, for greater reliability. There’s no rev limiter and they grumble on a steady throttle with intrusive surging. These are race bikes, raw, rough and meant to be held wide open. Early Vertemati Supermoto engines have a problem with over-pressurised crankcases. The 450 kicks out about 45bhp, the 501 about 47bhp and the 570 about 55bhp. Very late Vertemati Supermotos have fuel-injection.