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| techtalk:ih:engmech03e [2017/12/20 03:33] – [Three angle valve seats - 1980 and up FLT/FL/FX/XL models] hippysmack | techtalk:ih:engmech03e [2018/01/21 15:16] (current) – [Three angle valve seats - FLT/FL/FX/XL models] hippysmack | ||
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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. | + | * 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. |
| - | * In April of 1981, this was reiterated for XL Models starting with cracnkcase | + | * In April of 1981, this was reiterated for XL Models starting with crankcase |
| - | * 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. ((HD Service Bulletin #M-782 dated June 3, 1980)) | + | * 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. | ||
| - Cut the 46° seat angle first. | - Cut the 46° seat angle first. | ||
