Namura Standard Bore Top End Rebuild Kit Size B for Yamaha YZ450F 2020-2022 97mm
Namura Standard Bore Top End Rebuild Kit Size B for Yamaha YZ450F 2020-2022 97mm
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Standard Bore Top End Rebuild Kit Size B for Yamaha YZ450F 2020-2022
The Standard Bore Top End Rebuild Kit Size B delivers a complete set of piston, rings, pin, and gaskets for restoring compression and power in 2020-2022 Yamaha YZ450F engines, featuring a 97mm bore.
Overview
This top end rebuild kit is engineered for Yamaha YZ450F models from 2020 to 2022, providing a precise 97mm bore and Size B piston for a reliable overhaul. The kit includes a piston, rings, wrist pin, circlips, and all necessary gaskets to complete the job. Whether rebuilding after hours of hard riding or performing preventative maintenance, this top end rebuild kit ensures the engine runs like new.
Built For Performance
- 97mm bore piston designed for standard cylinder dimensions
- Size B piston provides proper clearance for stock Yamaha YZ450F cylinders
- Complete gasket set included for a hassle-free installation
- Heat-treated wrist pin and circlips ensure secure assembly
- Matching rings pre-gapped for quick installation
- All components are precision-machined to Namura's quality standards
Fits These Machines
- for Yamaha YZ450F 2020
- for Yamaha YZ450F 2021
- for Yamaha YZ450F 2022
On-The-Job Use
- Motocross and supercross racing requiring frequent top end refresh
- Off-road trail and desert riding where engine longevity is critical
- Complete engine rebuild during off-season maintenance
- High-performance recreational riding on closed courses
Specs At A Glance
| Bore Diameter | 97mm |
| Piston Grade | Size B |
| Kit Contents | Piston, Rings, Wrist Pin, Circlips, Gaskets |
| Engine Type | Yamaha YZ450F (2020-2022) |
Good To Know
Q: Does this kit include a new cylinder or only piston and gaskets? A: This kit includes piston, rings, wrist pin, circlips, and a full gasket set; it does not include a new cylinder.
Q: Is the piston pre-installed on the rod? A: No, the piston comes separately and must be assembled with the wrist pin and circlips during installation.
Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.
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