2017 YAMAHA YZ450F
RACER’S GUIDE TO THE
The reliability of the YZ450F engine is legendary. RELIABILITY
If you are looking for the most reliable 450cc motocross
bike made, look no further than the YZ450F. It is bullet-
proof. It never needs valve adjustment. Piston life is close
to 100 hours, and nothing breaks on this bike. If you are a
bike breaker, the Yamaha YZ450F is the best bike to own.