§ 01 / Part
09100970 PISTON KIT REPLICA Ø 66.40 B
incl. VAT
Usually dispatched within 3 working days.
Authorised stockist
VERTEX
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§ 02 / About this part
What it is
The VERTEX PISTON KIT REPLICA Ø 66.40 B, motocross part. Stocked by Iron Offroad, the UK MX hard parts specialist.
This cast piston is a direct replacement for OEM part 1P8-11631-00-A0. It sits in the top-end, designed to provide reliable performance and a factory-standard seal. The 66.40mm (B) sizing is intended for cylinders with moderate hours that require a slightly larger diameter to maintain correct skirt clearance. Periodic top-end swaps are necessary to prevent ring wear and maintain engine compression. Before fitting, check the ring end gap and ensure the arrow on the crown points toward the exhaust. This kit includes the piston, rings, pin, and circlips for your rebuild.
§ 03 / Specs
The numbers
- Brand
- VERTEX
- Part number
- 09100970
- Weight
- 0.32 kg
- OEM cross-refs
- 1P8-11631-00-A0
- VAT
- 20%
// Fitment
Will it fit your bike?
Fits 5 models · 5 year-bands
Fantic 1 model
Yamaha 4 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
