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Continue to ChatIntake Valve - 150cc to 400cc, ATV, 300cc, 2x4, 4x4 and 4x4 IRS - 20A2560 - PBC1826F1 - https://www.electricbikeusa.net/shop/engines-parts-upgrades/intake-valve-150cc-to-400cc-atv-300cc-2x4-4x4-and-4x4-irs-20a2560-pbc1826f1