Description
If you’re rebuilding your Honda XR100R’s top end, a quality piston kit is non-negotiable—it’s the foundation of reliable power delivery and engine longevity. The Wiseco PK1274 delivers OEM-level fitment with a forged aluminum construction that handles sustained high RPMs without sacrificing durability. Whether you’re refreshing an aging engine or optimizing a trail bike, this complete kit eliminates the guesswork and gets you back to riding.
- Fitment: Honda XR100R 1985-1991
- Bore Diameter: 54mm
- Compression Ratio: 9.4:1
- Material: Forged aluminum
- Includes: Piston, rings, wrist pin, gaskets
- Installation: Bolt-on (top-end assembly)
- Engine Type: 2-stroke
- Manufacturer: Wiseco
- MPN: PK1274






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