{"product_id":"royal-enfield-1100683f-rear-master-cylinder-classic-350-bullet-350-j-series","title":"Royal Enfield 1100683\/F – Rear Master Cylinder Assembly (OEM) For Reborn \u0026 Bullet 350 J Series","description":"\u003cp data-end=\"1279\" data-start=\"883\"\u003eRestore factory braking performance with the \u003cstrong data-end=\"985\" data-start=\"928\"\u003eRoyal Enfield 1100683\/F Rear Master Cylinder Assembly\u003c\/strong\u003e—a genuine OEM hydraulic unit for \u003cstrong data-end=\"1053\" data-start=\"1019\"\u003eJ-Series Classic 350 (2021–on)\u003c\/strong\u003e and \u003cstrong data-end=\"1091\" data-start=\"1058\"\u003eJ-Series Bullet 350 (2023–on)\u003c\/strong\u003e. Built to Royal Enfield specifications, the assembly maintains correct bore size, piston travel and seal integrity for consistent rear-brake pressure and a firm, predictable pedal feel.\u003c\/p\u003e\n\u003cp data-end=\"1664\" data-start=\"1281\"\u003eEach unit comes pre-configured for a straightforward swap onto the OEM bracket. Replace a leaking or spongy cylinder during routine service or accident repair to bring back reliable, ABS-ready braking response. As an OE part, 1100683\/F matches your original fittings and brake line connection, eliminating trial-and-error and ensuring long service life in Indian riding conditions.\u003c\/p\u003e\n\u003cblockquote data-end=\"1802\" data-start=\"1666\"\u003e\n\u003cp data-end=\"1802\" data-start=\"1668\"\u003eTip: Always bleed the system with fresh DOT brake fluid after installation and inspect pads\/rotor while you’re there for best results.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003chr data-end=\"1807\" data-start=\"1804\"\u003e\n\u003ch2 data-end=\"1824\" data-start=\"1809\"\u003eKey features\u003c\/h2\u003e\n\u003cul data-end=\"2385\" data-start=\"1825\"\u003e\n\u003cli data-end=\"1927\" data-start=\"1825\"\u003e\n\u003cp data-end=\"1927\" data-start=\"1827\"\u003e\u003cstrong data-end=\"1842\" data-start=\"1827\"\u003eGenuine OEM\u003c\/strong\u003e rear master cylinder — \u003cstrong data-end=\"1886\" data-start=\"1866\"\u003eRE P\/N 1100683\/F\u003c\/strong\u003e.\u003cspan data-state=\"closed\" class=\"\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2059\" data-start=\"1928\"\u003e\n\u003cp data-end=\"2059\" data-start=\"1930\"\u003e\u003cstrong data-end=\"1944\" data-start=\"1930\"\u003eDirect fit\u003c\/strong\u003e for \u003cstrong data-end=\"1982\" data-start=\"1949\"\u003eClassic 350 Reborn (J-Series)\u003c\/strong\u003e and \u003cstrong data-end=\"2010\" data-start=\"1987\"\u003eBullet 350 J-Series\u003c\/strong\u003e—no mods. \u003cspan data-state=\"closed\" class=\"\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2140\" data-start=\"2060\"\u003e\n\u003cp data-end=\"2140\" data-start=\"2062\"\u003eFactory-matched \u003cstrong data-end=\"2095\" data-start=\"2078\"\u003ebore \u0026amp; piston\u003c\/strong\u003e for proper hydraulic ratio and brake feel.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2212\" data-start=\"2141\"\u003e\n\u003cp data-end=\"2212\" data-start=\"2143\"\u003e\u003cstrong data-end=\"2170\" data-start=\"2143\"\u003eLeak-resistant OE seals\u003c\/strong\u003e and durable body for long service life.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2295\" data-start=\"2213\"\u003e\n\u003cp data-end=\"2295\" data-start=\"2215\"\u003e\u003cstrong data-end=\"2233\" data-start=\"2215\"\u003eABS compatible\u003c\/strong\u003e when fitted on OE systems; retains stock brake performance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2385\" data-start=\"2296\"\u003e\n\u003cp data-end=\"2385\" data-start=\"2298\"\u003e\u003cstrong data-end=\"2324\" data-start=\"2298\"\u003eInstallation friendly:\u003c\/strong\u003e mounts to OE bracket; reuse OE hose\/clevis where applicable.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"2390\" data-start=\"2387\"\u003e\n\u003ch2 data-end=\"2410\" data-start=\"2392\"\u003eWhat’s included\u003c\/h2\u003e\n\u003cul data-end=\"2478\" data-start=\"2411\"\u003e\n\u003cli data-end=\"2478\" data-start=\"2411\"\u003e\n\u003cp data-end=\"2478\" data-start=\"2413\"\u003eRear master cylinder assembly with reservoir (as per OEM supply).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-end=\"3180\" data-start=\"3173\"\u003eFAQs\u003c\/h2\u003e\n\u003cp data-end=\"3368\" data-start=\"3181\"\u003e\u003cstrong data-end=\"3245\" data-start=\"3181\"\u003e1) Will 1100683\/F fit my Classic 350 Reborn (2021+) exactly?\u003c\/strong\u003e\u003cbr data-end=\"3248\" data-start=\"3245\"\u003eYes—this is the OEM rear master cylinder for the \u003cstrong data-end=\"3329\" data-start=\"3297\"\u003eJ-Series Classic 350 (2021→)\u003c\/strong\u003e. \u003cspan data-state=\"closed\" class=\"\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"3549\" data-start=\"3370\"\u003e\u003cstrong data-end=\"3426\" data-start=\"3370\"\u003e2) Does it fit the new Bullet 350 (J-Series, 2023→)?\u003c\/strong\u003e\u003cbr data-end=\"3429\" data-start=\"3426\"\u003eYes—listed by multiple reputable sellers specifically for \u003cstrong data-end=\"3510\" data-start=\"3487\"\u003eBullet 350 J-Series\u003c\/strong\u003e. \u003cspan data-state=\"closed\" class=\"\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"3790\" data-start=\"3551\"\u003e\u003cstrong data-end=\"3595\" data-start=\"3551\"\u003e3) Does it fit Hunter 350 or Meteor 350?\u003c\/strong\u003e\u003cbr data-end=\"3598\" data-start=\"3595\"\u003e\u003cstrong data-end=\"3618\" data-start=\"3598\"\u003eNo—don’t assume.\u003c\/strong\u003e Hunter typically uses \u003cstrong data-end=\"3655\" data-start=\"3641\"\u003eRAB00874\/A\u003c\/strong\u003e; Meteor dealer listings reference \u003cstrong data-end=\"3701\" data-start=\"3690\"\u003e1100728\u003c\/strong\u003e. Match the OE number on your bike before ordering. \u003cspan data-state=\"closed\" class=\"\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"3937\" data-start=\"3792\"\u003e\u003cstrong data-end=\"3836\" data-start=\"3792\"\u003e4) Is this a genuine Royal Enfield part?\u003c\/strong\u003e\u003cbr data-end=\"3839\" data-start=\"3836\"\u003eYes—\u003cstrong data-end=\"3856\" data-start=\"3843\"\u003e1100683\/F\u003c\/strong\u003e is shown in the official RE parts catalog.\u003c\/p\u003e\n\u003cp data-end=\"3937\" data-start=\"3792\"\u003e\u003cspan data-state=\"closed\" class=\"\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003ca class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]! transition-colors duration-150 ease-in-out\" alt=\"https:\/\/www.bike-parts-royalenfield.com\/royalenfield-motorcycle\/assignment_spare_parts\/1100683_F?utm_source=chatgpt.com\" rel=\"noopener\" href=\"https:\/\/www.bike-parts-royalenfield.com\/royalenfield-motorcycle\/assignment_spare_parts\/1100683_F?utm_source=chatgpt.com\" target=\"_blank\"\u003e\u003cspan class=\"relative start-0 bottom-0 flex h-full w-full items-center\"\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between overflow-hidden\"\u003e\u003cspan class=\"max-w-full grow truncate overflow-hidden text-center\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cstrong data-end=\"3977\" data-start=\"3939\"\u003e5) Are hoses or hardware included?\u003c\/strong\u003e\u003cbr data-end=\"3980\" data-start=\"3977\"\u003eThe assembly is supplied as the master cylinder\/reservoir. Reuse your OE hose and pedal linkage unless damaged.\u003c\/p\u003e","brand":"UNDER THE HOOD","offers":[{"title":"Default Title","offer_id":50294051307815,"sku":null,"price":2160.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0878\/7447\/0183\/files\/FDEB6BB5-4430-4E05-AF93-1C3FA8948DEF.jpg?v=1758998026","url":"https:\/\/underthehood.co.in\/products\/royal-enfield-1100683f-rear-master-cylinder-classic-350-bullet-350-j-series","provider":"UNDER THE HOOD","version":"1.0","type":"link"}