{"product_id":"mcs936791","title":"MCS Alternator Rotor \/ Clutch Shell \u0026 Sprocket Assembly – L1984–1990 4-Speed XL Sportster","description":"\u003ch2\u003eMCS Alternator Rotor \/ Clutch Shell \u0026amp; Sprocket Assembly – L1984–1990 4-Speed XL Sportster\u003c\/h2\u003e\n\u003cp\u003eOEM style replacement alternator rotor\/clutch shell with primary chain sprocket combo. Incl. ball bearing. Magnets are encapsulated in a stainless steel shell. This will help prevent magnets coming loose; which fequently happens with OEM equipment. OEM replacement reference 36791-84. Note: Replacement clutch hub ball bearing is separately available as 556626\/36799-84. TECH TIP: On L84-90 XL Sportster the alternator is installed on the clutch hub. This was poor design. Excessive clearance between clutch hub bearing; mainshaft ball bearing and needle bearing between the two parts of the transmission shaft allows the clutch hub to cock sideways; enough for contact between stator and clutch hub. Grinding stator and\/or clutch hub is sometimes done; but not recommended by MCS; to add clearance which reduces output. Better is installing new bearings. From 1991-on the alternator was moved and the rotor is run on the sprocket shaft. This fixed the problem.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eL84-90 4-speed XL Sportster (NU)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e MCS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e DRIVE LINE-CLUTCH \u0026gt; CLUTCH SHELLS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e EA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 936791\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"MCS","offers":[{"title":"Default Title","offer_id":57378589475203,"sku":"MCS936791","price":609.3,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/936791k.jpg?v=1775670057","url":"https:\/\/hogparts.com\/products\/mcs936791","provider":"Hogparts UK Ltd","version":"1.0","type":"link"}