§ 01 / Part
09106586 PISTON KIT RR390 15-23 C
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 RR390 15-23 C, top end. Stocked by Iron Offroad, the UK MX hard parts specialist.
This top-end kit restores compression and engine response for your rebuild. The piston sits at the heart of the combustion cycle, reciprocating within the cylinder bore. Over time, heat cycles and friction wear the rings and skirt, leading to blow-by and power loss. This C-size kit is designed for cylinders with more significant wear, providing a tighter seal than standard or B-sized options. Always check your ring end gap before final assembly. Ensure the arrow on the crown points toward the exhaust port. Proper lubrication of the gudgeon pin and small-end bearing is essential.
§ 03 / Specs
The numbers
- Brand
- PROX
- Part number
- 09106586
- Category
- Top End
- Weight
- 0.31 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
// Related
