1Applicable Model: The front brake caliper is for CR125R CR250R CRF150F CRF230F CRF250R CRF250X CRF450R CRF450X XR250R XR400R XR600R XR650R. 2OE Number: The part number for reference is 45150KCY671, and the replacement part numbers for reference are 45150KZ4J21, 45150K28911, 45150MAC681. 3Precise Control: The front brake caliper assembly can precisely control the braking force, helping riders better control the braking process, enhancing the overall riding experience. 4Perfect Heat Dissipation: The motorcycle front brake caliper features improved heat dissipation to prevent overheating and ensure a safe ride. 5Adjustment Performance: Hydraulic caliper allows riders to adjust clamping force and braking feeling for optimal performance based on preferences. 1 xFrontBrakeCaliper