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Ships within 48 hours · Estimated delivery Aug 24 - Aug 29
(V)-rated for speeds of 149+ mph or (W)-rated for speeds of 168+ mph
MPN: 21-614H
brackets and hardware
MPN: D45-18-509
Replacement bleed nipples available separately
01-'13 for Yamaha WR250F PROX Intake Valve Conversion Set Ti-Steel Gas/Yam (V)-rated for speeds of 149+Manufacturer: 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
