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MX Yamaha YZ250 piston Click to zoom

Kit includes: Piston, rings (Riken/NP), circlips, and gudgeon pin

Yamaha

YZ250

'99-'11
Mitaka part number: 91.2320
In Stock
From
£57.89 exc. VAT

Specifications

Dimensions

Bore Size 66.40mm
Crown Height 29.00mm
Overall Length 76.00mm
Dome Height 2.50mm
G.P. Diameter 18.00mm
Port Y/N N
Ring Peg Position 13.50mm
Cutout Height 20.00

Measurement Reference

Piston measurement diagram - side view Piston measurement diagram - top view

Stock & Pricing

Part # Type Stock Price
91.2320.A Standard (Grade A) 100 £57.89
91.2320.B Standard (Grade B) 100 £57.89
91.2320.C Standard (Grade C) 100 £57.89
91.2320.D Standard (Grade D) 67 £57.89
91.2320.05 0.50MM OVERSIZE 64 £57.89
91.2320.10 1.00MM OVERSIZE 96 £57.89
91.2320.15 1.50MM OVERSIZE 100 £57.89
Last updated: 2026-09-13 09:40:06