{"product_id":"mcs555687","title":"Belt Drives Ltd. 1-1\/2\" Primary Belt Drive Kit. Closed. Kickstart – 1978–1983 4-Speed Big Twin","description":"\u003ch2\u003eBelt Drives Ltd. 1-1\/2\" Primary Belt Drive Kit. Closed. Kickstart – 1978–1983 4-Speed Big Twin\u003c\/h2\u003e\n\u003cp\u003e8mm pitch. Without idler. Kickstart only. Comes as pulley \u0026amp; belt kit only. Stock clutch can be re-used. 61-41 drive ratio. Note: See 970974 for the replacement 1-1\/2\" wide 8mm 132t. + belt. Note: The difference in belts between 65-78 and 78-83 FL; FX models is due to a minor difference in primary housing length. Available belts are therefore designated as a - (minus; slightly shorter \/ MCS 506915) or + (plus; slightly longer \/ MCS 970974) belt; although the number of teeth is identical.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e78-83 4-speed Big Twin (NU)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Belt Drives Ltd.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e BELT DRIVES \u0026gt; BELT DRIVE KITS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e KIT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 555687\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BDL","offers":[{"title":"Default Title","offer_id":57377686716803,"sku":"MCS555687","price":651.37,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/555687k_2e3fd7c9-6a16-42e9-84a0-e70ba0406635.jpg?v=1775727315","url":"https:\/\/hogparts.com\/products\/mcs555687","provider":"Hogparts UK Ltd","version":"1.0","type":"link"}