Specifically designed for terrain specialists, this PROX steel intake valve conversion kit is aimed at YZ/WR 450F owners looking for a robust valve set suitable for off-road use. The parts are forged from a single piece for precise geometry and reliable mechanical performance, and the kit comes complete with the necessary springs for the application.
- Brand: PROX
- Designation: Steel intake valve conversion kit
- Composition: forged one-piece steel intake valves + springs (complete kit)
- Universe: Motocross / off-road
- Compatibility (common models):
- YAMAHA YZ 450 F (CJ22) – 2018
- YAMAHA WR 450 F (RE45) – 2018
- YAMAHA YZ 450 F (CJ21) – 2017
This kit is designed to facilitate maintenance and restoration of the distribution on motocross machines. For safe installation and adjustment according to manufacturer specifications, it is recommended to have the installation performed by a qualified workshop or an experienced motorcycle mechanic.
Manufacturer reference: 28.SIS2444-2
