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Locating '81 xr500r big bore kit...

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Had mine bored to fit a Wossner Piston, 91mm I think 520cc, only went as big as I had to for a clean bore.

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Wiseco still make the kit.

Right from the Wiseco webpage...

Part# - 4117M09500

Price - $220.74

Bore - 95.00mm

Oversize - 6.00mm

Compression Ratio - Actual: 10.5:1

Cylinders: 1

Displacement: 567.06cc

Stroke: 80.00mm

Notes: Cylinder sleeving required

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