Replaces the OEM valves and valve springs
Steel, nitrided valves for increased durability and less wear under extreme conditions
Stronger valve springs deal with the extra weight of the steel valves
Springs are made from premium chrome vanadium steel for higher performance and durability at high rpm
Kit contains a set of steel intake or exhaust valves plus a set of specially designed valve springs; can be installed using the OEM retainers, bases and valve seals

More Information
Manufacturer SKU	28.SIS2402-2
Manufacturer:	Prox
Department	PAM-PU
Show Stock	Yes
Riding Style	Adventure Touring / Dual-Sport, Off-Road
California Restricted Product:	No

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Year	Make	Model
2001-2013	Yamaha	WR 250 F
2001-2013	Yamaha	YZ 250 F

Valve and Spring Kit 28.SIS2402-2