§ 01 / Part
09100439 PISTON KIT ALUMINUM 94.95MM A
incl. VAT
Usually dispatched within 3 working days.
Authorised stockist
PROX
14-day returns
Easy & hassle-free
Secure checkout
256-bit encryption
§ 02 / About this part
What it is
The PROX PISTON KIT ALUMINUM 94.95MM A, top end. Stocked by Iron Offroad, the UK MX hard parts specialist.
Cast aluminium piston at the standard 94.95mm A grade, cross-referencing Yamaha OEM 5TJ-11631-00. Suits a fresh or in-spec bore on the YZ 450 F, WR 450 F and Gas Gas EC 450 F. Four-stroke top ends lose ring seal and skirt clearance with hours; a new piston brings compression back to where the bike left the crate. Kit comes complete: piston, rings, pin and circlips. Deglaze the bore, check ring end-gap, torque to spec. Straightforward service-interval work.
§ 03 / Specs
The numbers
- Brand
- PROX
- Part number
- 09100439
- Category
- Top End
- Weight
- 0.40 kg
- OEM cross-refs
- 5TJ-11631-00
- 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
// Related
