
§ 01 / Part
09104911 PISTON KIT FORGED STEEL PERFORMANCE REPLACEMENT / YAMAHA / SIZE +0,50
incl. VAT
Usually dispatched within 3 working days.
Authorised stockist
WOSSNER
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§ 02 / About this part
What it is
The WOSSNER PISTON KIT FORGED STEEL PERFORMANCE REPLACEMENT / YAMAHA / SIZE +0,50, motocross part. Stocked by Iron Offroad, the UK MX hard parts specialist.
This kit is designed for bored-out cylinders requiring an increase in diameter. It sits at the heart of your top-end to restore power after a cylinder repair or modification. Forged material offers superior strength for high-stress race applications. Replace this component at regular service intervals to avoid ring land failure or skirt collapse. The kit includes the piston, rings, gudgeon pin, and circlips. You must verify the final bore size matches this specific oversize before assembly. Check ring end gaps and ensure circlips are fully seated in the grooves. Orient the crown arrow toward the exhaust.
§ 03 / Specs
The numbers
- Brand
- WOSSNER
- Part number
- 09104911
- Weight
- 0.48 kg
- VAT
- 20%
// Fitment
Will it fit your bike?
Fits 2 models · 2 year-bands
* 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
// WOSSNER

