§ 01 / Part
ProX Piston Kit 09105300 for Yamaha WR250F 2018–2019 YZ250F 2016–2018 YZ250FX 2017–2019
incl. VAT
Dispatched in 2–3 working days · delivered in 6–10.
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PROX
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§ 02 / About this part
What it is
ProX piston kit to fit the Yamaha WR250F, model years 2018–2019; Yamaha YZ250F, model years 2016–2018; and Yamaha YZ250FX, model years 2017–2019.
Your top-end rebuild relies on precise tolerances within the cylinder bore. This assembly replaces the reciprocating components to restore compression and throttle response. Most riders swap these at set hour intervals to prevent skirt failure or ring groove wear. Check your cylinder for wear and select the correct size grade for your bore. The kit includes the piston, rings, gudgeon pin, and circlips. Ensure the arrow on the crown points toward the exhaust port during installation. Always verify your ring end gap before final assembly to ensure reliable performance on the track or trail.
§ 03 / Specs
The numbers
- Brand
- PROX
- Part number
- 09105300
- Category
- Top End
- Weight
- 0.21 kg
- VAT
- 20%
// Fitment
Will it fit your bike?
Fits 3 models · 3 year-bands
Yamaha 3 models
No matches. Try a different make or model.
* Fitment data is provided as a guide. Verify compatibility against the bike's owner's manual or service handbook before ordering. Iron Offroad accepts no liability for incorrect application. Full terms and conditions apply.
§ 05 / About Iron Offroad
Iron Offroad
// Related
