01-'13 for Yamaha WR250F PROX Intake Valve Conversion Set Ti-Steel Gas/Yam Provides smoother torque curves for

Provides smoother torque curves for more usable power

These new JT Racing sprockets are designed and engineered to withstand the extreme pro-race conditions

Option: Rear - 150/80-16

brackets and hardware

Replacement bleed nipples available separately

01-'13 for Yamaha WR250F PROX Intake Valve Conversion Set Ti-Steel Gas/Yam Provides smoother torque curves forManufacturer: Pro X MPN: 28. SIS2402 2 Title: Steel Valves and Spring Kits Option: Intake An alternative where the O. E. M. application uses expensive and less durable titanium valves These steel valves offer increased durability and easily extends the lifespan to 3x that of the O. E. M. titanium valves Nitrided valves offer high micro hardness while a super smooth surface finish reduces friction between stem and guide Special stronger valve springs