{"product_id":"mcs531308","title":"S\u0026S 90-99 B.t. Pinion Shaft Gear\/Conversion Kit. Blue – L1977–1984 Shovelhead; 1984–1989 Evo Big…","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\n\u003cp\u003eBlue color coded for average size. Stock replacement for all L77-89 B.T. models. Used as conversion kit on 90-99 Evo B.T. with pre-90 pinion shaft. For 1989 and earlier type pinion shafts used on 90-99 Evo B.T. models (engines that use S\u0026amp;S flywheels or other multiple parts flywheel assemblies) S\u0026amp;S offers this conversion package. Kits include a color coded 77-89 pinion gear; 54-89 oil pump drive gear; 54-89 pinion shaft gear spacer and a 54-89 pinion shaft gear nut. Note see: 531306 Black (smallest); 531308 Blue (average); 904148 Red (average); 531309 Yellow (biggest). Note: All kits must be used with a 73-99 B.T. style oil pump driven gear (S\u0026amp;S 531209 \/ OEM 26345-73). Note: If the stock gear is unmarked and the size is unknown or you are scratch building an engine and without gear; S\u0026amp;S recommend a gear in the middle of the size range. These sizes were used more often and should provide adequate gear clearance under most circumstances. When in doubt; use a gear from the middle to the small side of the range; because a combination of looser fitting smaller gears will give a harmless clicking sound but to tight can cause a wining sound; binding and premature wear. Consult the factory service manual for information on optimum cam gear to pinion gear fit instructions before you order.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eL77-84 Shovelhead\u003c\/li\u003e\n\u003cli\u003e84-89 Evo Big Twin\u003c\/li\u003e\n\u003cli\u003eConversion kit for 90-99 Evo Big Twin when using custom pre-1990 multiple parts flywheel assemblies (NU)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Details\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e S\u0026amp;S\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Motor parts \u0026gt; Pinion conversion 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 531308\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePart Numbers\u003c\/h2\u003e\u003cp\u003eMCS Part Number: 531308\u003cbr\u003eManufacturer Part Number: 33-4181\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":44334718157120,"sku":"MCS531308","price":180.14,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/531308k.jpg?v=1776035943","url":"https:\/\/hogparts.co.uk\/products\/mcs531308","provider":"Hogparts UK Ltd","version":"1.0","type":"link"}