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Continue to ChatPiston and Ring Set - 50cc, 40mm, 10mm, Yamaha PW50 (10pcs) - 30A8115 - PBC1738F1 - https://www.powersporta.com/express-parts-catalog/engines-parts-upgrades/piston-and-ring-set-50cc-40mm-10mm-yamaha-pw50-10pcs-30a8115-pbc1738f1