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Continue to ChatValve Stem Seal - Hisun, 400-500cc, ATV/UTV - 20A2240 - PBC1560F1 - https://www.powersportamerica.com/express-parts-catalog/engines-parts-upgrades/valve-stem-seal-hisun-400-500cc-atv-utv-20a2240-pbc1560f1