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techtalk:ih:engmech03e [2017/12/20 03:34]
hippysmack [Three angle valve seats - FLT/FL/FX/XL models]
techtalk:ih:engmech03e [2018/01/21 15:16]
hippysmack [Three angle valve seats - FLT/FL/FX/XL models]
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-  * The MoCo issued a bulletin in June of 1980 stating that all 1980 production models incorporate three angle valve seats on the (intake and exhaust) ports on the heads. ((HD Service Bulletin #M-782 dated June 3, 1980)) +  * The MoCo issued a bulletin in June of 1980 stating that all 1980 production models incorporate three angle valve seats on the (intake and exhaust) ports on the new -80 heads. ((HD Service Bulletin #M-782 dated June 3, 1980))  
-  * In April of 1981, this was reiterated for XL Models starting with cracnkcase ​(781012001)((HD Service Bulletin #M-827 dated April 24, 1981))+  * In April of 1981, this was reiterated for XL Models starting with crankcase ​(781012001) ​with the introduction of new heads for the 81 model year, ((HD Service Bulletin #M-827 dated April 24, 1981)) ​which were available as replacement for previous year models. ​
   * There are specific procedures that must be followed when cutting this type of valve seat. Always be sure to reface the valves before you cut the seats. A Neway Valve Seat Cutter (444-HDF) or other quality equipment is recommended for this.  ​   * There are specific procedures that must be followed when cutting this type of valve seat. Always be sure to reface the valves before you cut the seats. A Neway Valve Seat Cutter (444-HDF) or other quality equipment is recommended for this.  ​
   * Follow the procedures outlined in the service manual for removing and re-facing valves and guides and decarbonizing the combustion chamber.   * Follow the procedures outlined in the service manual for removing and re-facing valves and guides and decarbonizing the combustion chamber.