Exhaust valve and spring kit Yamaha YZ450F 2010-13 28.SES2440-1

Replaces OEM valves and valve springs
Steel, nitrided valves provide greater durability and reduced wear in extreme conditions
Stronger valve springs handle the extra weight of steel valves
Springs are made from the highest quality chrome vanadium steel for increased performance and durability at high RPMs
Kit includes a set of steel intake or exhaust valves and a set of specially designed valve springs; can be installed using OEM retainers, bases and valve seals
PU 0926-1427

Adaptability: