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Master cylinder bore/detail: 12
Front Master Cylinder Rebuild Kit - Replaces Yamaha OEM 1J3-W0041-20
gasket/O-ring needs
Yamaha XS650S (1978-83)
Yamaha RD400 (1976-78)
Yamaha Motorcycle Piston Ring Tool - 85mm TT500H 1981 Master cylinder bore/detail: 12Piston Ring Tool 85mm. This piston ring tool helps compress or guide piston rings during cylinder and top end assembly. Use it when installing pistons so rings stay controlled and are less likely to snag, twist, or chip during assembly. Fitment Compatibility Universal Custom: Universal Custom Product Details Piston ring installation tool Tool size detail: 85mm Sold individually XS650Direct part number: 35 9112 Before Ordering Confirm piston diameter,