§ 01 / Part
09100028 PISTON KIT FORGED 76.96MM B
incl. VAT
Usually dispatched within 3 working days.
Authorised stockist
PROX
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§ 02 / About this part
What it is
The PROX PISTON KIT FORGED 76.96MM B, motocross part. Stocked by Iron Offroad, the UK MX hard parts specialist.
A forged top-end kit for the 250F platform: YZ 250 F, WR 250 F and the Gas Gas EC 250 F. Cross-references Yamaha part 5NL-11631-20. The B designation means a 76.96mm skirt, sized for cylinders measuring at the tighter end of factory tolerance; gauge the bore before ordering, not after. Forged material takes sustained race-pace heat better than a cast slug. Piston, rings, pin and circlips in the box. Set the ring end gap to spec and it goes back together like OEM.
§ 03 / Specs
The numbers
- Brand
- PROX
- Part number
- 09100028
- Weight
- 0.26 kg
- OEM cross-refs
- 5NL-11631-20
- VAT
- 20%
// Fitment
Will it fit your bike?
Fits 3 models · 3 year-bands
Gas Gas 1 model
Yamaha 2 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
