{"product_id":"wilwood-120-7737-rd","title":"Wilwood Harley-Davidson Red GP310 Left Front Caliper (1984–1999), 3.44-Inch Fork Mount, and 1983 XR1000","description":"\u003cp\u003eThe red left-hand GP310 is the earlier front motorcycle version with 3.44-inch lug spacing. It provides four-piston hydraulic braking for the supported 1984–1999 Harley-Davidson front arrangement. The selected piston area is 2.46 square inches, and the caliper uses stainless pistons without external dust boots. Founded in 1977 by Bill Wood, Wilwood Engineering is based in Camarillo, California. Its disc brake systems and components serve motorsport, street-performance and specialized applications. Calipers, brake rotors, master cylinders, valves, fittings and brake lines are among its products, selected according to the complete brake system’s requirements.\u003c\/p\u003e\u003ch3\u003eTechnical Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eManufacturer part number: 120-7737-RD\u003c\/li\u003e\n\u003cli\u003eCaliper type: GP310 Motorcycle Front (1984-1999)\u003c\/li\u003e\n\u003cli\u003eConstruction: Billet Aluminium\u003c\/li\u003e\n\u003cli\u003eFinish: Red Powder Coat\u003c\/li\u003e\n\u003cli\u003ePiston bores: 1.25 \/ 1.25 inches\u003c\/li\u003e\n\u003cli\u003ePiston type: Stainless\u003c\/li\u003e\n\u003cli\u003ePiston count: 4\u003c\/li\u003e\n\u003cli\u003ePublished piston area: 2.46 square inches\u003c\/li\u003e\n\u003cli\u003eDust boots: No\u003c\/li\u003e\n\u003cli\u003eNominal rotor width: 0.25 inch\u003c\/li\u003e\n\u003cli\u003eRotor thickness limits: 0.18–0.25 inches\u003c\/li\u003e\n\u003cli\u003eRotor diameter limits: 11.00–11.50 inches\u003c\/li\u003e\n\u003cli\u003eMounting style: Lug\u003c\/li\u003e\n\u003cli\u003eMounting side: Left Hand\u003c\/li\u003e\n\u003cli\u003eMounting centers: 3.44 inches\u003c\/li\u003e\n\u003cli\u003eMount height: 2.33 inch\u003c\/li\u003e\n\u003cli\u003eHydraulic inlet thread: 3\/8-24\u003c\/li\u003e\n\u003cli\u003eRequired pad shape: 6208\u003c\/li\u003e\n\u003cli\u003ePublished pad area: 3.65 square inches\u003c\/li\u003e\n\u003cli\u003ePublished pad volume: 0.63 cubic inches\u003c\/li\u003e\n\u003cli\u003eManufacturer-listed component weight: 2.1 lb\u003c\/li\u003e\n\u003cli\u003eSupplied brake components: Individual GP310 caliper with brake pads\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment \u0026amp; Compatibility\u003c\/h3\u003e\u003cp\u003eConfirm the exact motorcycle and fork mount, applying Wilwood’s Springer and four-speed FL exclusions. Verify rotor width, diameter and pad position with the front assembly. On a modified bike, also check the hose fitting, wheel-spoke envelope and the complete system’s fluid requirements rather than relying on the original model year. Wilwood also specifically includes the 1983 Harley-Davidson XR1000 front application; verify the same fork, rotor and mounting requirements.\u003c\/p\u003e\u003cp\u003ePMB Performance brings over 20 years of brake and parts experience to selection questions. Send the existing caliper reference and brake-package details for help checking compatibility.\u003c\/p\u003e\u003cp\u003eBrake-pad warning: Cancer and Reproductive Harm. \u003ca href=\"https:\/\/www.P65Warnings.ca.gov\"\u003ewww.P65Warnings.ca.gov\u003c\/a\u003e. This warning applies to the brake pads.\u003c\/p\u003e","brand":"Wilwood","offers":[{"title":"Default Title","offer_id":67764660830386,"sku":"120-7737-RD","price":281.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0521\/8792\/2610\/files\/GP_310_Motorcycle_Red-xl_35cdcc13-2bad-470e-8a20-d2b105562f81.jpg?v=1792514567","url":"https:\/\/pmbperformance.com\/products\/wilwood-120-7737-rd","provider":"PMB Performance","version":"1.0","type":"link"}