For 1981-83
Yamaha XJ650
Custom Big Bore Pistons Kit !
Choice of 65.5mm or 66mm Piston size
(2.5mm or 3mm oversize)
FEATURING:
- 10.5:1 Compression
- Contact Reduction Grooves
- Lateral Gas Porting
- Accumulator Grooves
- Forged and Diamond Cut on CNC machine in the USA!
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