Prox Steel Exhaust Valve conversion kitRef : PRO00518A / 1004725

PROX Steel Exhaust Valve Conversion Kit (manufacturer part number: 28.SES2444-1): a set designed for the engine distribution of Yamaha 450 cross motors. This conversion kit includes one-piece forged steel exhaust valves as well as the necessary springs for the application, allowing for a clean and controlled engine restoration or preparation.

• Material: forged steel exhaust valves
• Manufacturing: one-piece forged for strength
• Contents: complete kit delivered with application-specific springs
• Usage: conversion/replacement on cylinder head, intended for cross motorcycles

This kit is aimed at tuners, mechanics, and riders who are replacing or refurbishing the distribution of a YZ/WR 450F. The supplied components allow for the replacement of the exhaust valves and springs while maintaining compliance with assembly tolerances (machining of the seats and valve clearance adjustment always necessary before commissioning).

Main compatibilities:

• YAMAHA YZ 450 F (CJ22) (2018 - 450 cm3)
• YAMAHA WR 450 F (RE45) (2018 - 450 cm3)
• YAMAHA YZ 450 F (CJ21) (2017 - 450 cm3)

Category: Valve Conversion Kit — Universe: Cross. Check part number 28.SES2444-1 and compatibility with your cylinder head before ordering.