01-'13 for Yamaha WR250F PROX Intake Valve Conversion Set Ti-Steel Gas/Yam Option: Rear - 150/80-16

Option: Rear - 150/80-16

brackets and hardware

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

MPN: D45-18-509

MPN: 21-614H

01-'13 for Yamaha WR250F PROX Intake Valve Conversion Set Ti-Steel Gas/Yam Option: Rear - 150/80-16Manufacturer: 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