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Continue to ChatIntake and Exhaust Valve - 250cc - 20A2517 - PBC1728F1 - https://www.electricbikeusa.net/express-parts-catalog/engines-parts-upgrades/intake-and-exhaust-valve-250cc-20a2517-pbc1728f1
Intake and Exhaust Valve - 250cc - 20A2517 - PBC1728F1 - https://www.electricbikeusa.net/express-parts-catalog/engines-parts-upgrades/intake-and-exhaust-valve-250cc-20a2517-pbc1728f1