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techtalk:miscres:miscres50 [2021/08/08 21:33] hippysmack [General Part# Changes] |
techtalk:miscres:miscres50 [2024/01/09 15:38] (current) hippysmack |
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| - | ====== MiscRes: HD Part Numbers Explained ====== | + | ====== MiscRes: HD Part Numbers Explained ====== |
| THE PART NUMBER WILL MOST LIKELY NOT BE STAMPED INTO A PART. \\ | THE PART NUMBER WILL MOST LIKELY NOT BE STAMPED INTO A PART. \\ | ||
| However, some parts do have an actual part number printed on them (some electronics have part numbers inked). \\ | However, some parts do have an actual part number printed on them (some electronics have part numbers inked). \\ | ||
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| ====== General Part# Changes ====== | ====== General Part# Changes ====== | ||
| + | * **Original versus Updated part numbers**. \\ THE PARTS OR PART NUMBERS IN ANY VERSION PARTS CATALOG IS NOT MEANT TO BE TAKEN AS ORIGINAL PARTS OR PART NUMBERS. \\ The catalogs simply list what parts were available for sale or replacement at the time the book was written. \\ Each parts catalog (for public use) has a part number written on it (front cover, left side or sometimes first few pages) and each catalog is dated. \\ Most original parts catalogs will have 5 numbers and a dash code at the end of the part number with 2 numbers and NO letter (i.e. xxxxx-95). \\ The next revision of that parts catalog will be (xxxxx-95A) then (xxxxx-95B) and so on, including a new calendar date (year it was written). \\ As time goes by, original parts are obsoleted and replaced with updated parts. \\ The parts catalogs are also updated to reflect the current changes at that moment in time. \\ Retail stores (online or physical outlets) will usually follow suit and only list the "current" part number. \\ If you have an original parts catalog for your year model and try to order that part, you may very well be told it doesn't exist but "here is the part number they show". \\ And if you want to know the original part number, you have to check the original parts book (one without a letter on the end) to be as sure as possible. \\ [[techtalk:miscres:miscres12|Reference Factory Parts Catalogs]] | ||
| + | * **Example**: Flywheel assembly (23905-00) is listed in 2000-2003 original version parts catalogs. \\ The 2003 catalog went through a (-A) and a (-B) version. Both the (-03 and -03A) catalogs list the flywheel assembly as (23905-00). \\ However, the (-03B) catalog written in 2018 lists the flywheel assembly as (23905-00A). These two flywheels look worlds apart from each other. \\ And if you didn't originally have the -00 flywheels, you won't know that the -00A wheels were replacement for the originals. | ||
| * **Some parts will interchange even though the part number doesn't match your motorcycle**. \\ Subtle differences may include color, texture, or construction material changes. | * **Some parts will interchange even though the part number doesn't match your motorcycle**. \\ Subtle differences may include color, texture, or construction material changes. | ||
| * **Example**: All rigid Evo Sportster rocker boxes will bolt to all rigid Evo Sportsters. \\ The color or texture may change (natural, silver, chromed or blackened) but they all have the same function. \\ Some of these have different prefix and suffix numbers or a combination of old and new numbers. \\ And 04-up the lower box is the same as the rigid lower box with extra threaded holes added to mount the plastic breather valve assembly. \\ Slight changes sometimes just get a letter added on the end or an entire new part number. \\ [[techtalk:evo:engmech04#rocker_box_part_numbers|Reference Evo Rocker Box Page]] | * **Example**: All rigid Evo Sportster rocker boxes will bolt to all rigid Evo Sportsters. \\ The color or texture may change (natural, silver, chromed or blackened) but they all have the same function. \\ Some of these have different prefix and suffix numbers or a combination of old and new numbers. \\ And 04-up the lower box is the same as the rigid lower box with extra threaded holes added to mount the plastic breather valve assembly. \\ Slight changes sometimes just get a letter added on the end or an entire new part number. \\ [[techtalk:evo:engmech04#rocker_box_part_numbers|Reference Evo Rocker Box Page]] | ||
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| * **Example 1**: The oil pump changed in 2007 with MUCH taller and wider gerotors which included a bigger bore in the pump body. \\ The part number did not change (2000-2006 oil pump, 26204-91A) (2007-up oil pump, 26204-91A). \\ The internals in these two pumps WILL NOT INTERCHANGE. \\ [[techtalk:evo:oil03g|Reference Comparing the 03-06 and the 07 Style Oil Pumps]] | * **Example 1**: The oil pump changed in 2007 with MUCH taller and wider gerotors which included a bigger bore in the pump body. \\ The part number did not change (2000-2006 oil pump, 26204-91A) (2007-up oil pump, 26204-91A). \\ The internals in these two pumps WILL NOT INTERCHANGE. \\ [[techtalk:evo:oil03g|Reference Comparing the 03-06 and the 07 Style Oil Pumps]] | ||
| * **Example 2**: The 1957-1985 center motor mount bracket had 3 changes during those years all having the same part number. \\ The 57-E71 bracket (16250-57) has 3 round holes. \\ The L1971-76 version (16250-57) has 2 slotted holes and 1 round hole in the center and can be used on 57-76 motors. \\ The 77-85 version (16250-57) doesn't tie back to the frame and Can't Be Used On 57-76 Motors. \\ [[techtalk:ih:engmech09|Reference IH Motor Mount Page]] | * **Example 2**: The 1957-1985 center motor mount bracket had 3 changes during those years all having the same part number. \\ The 57-E71 bracket (16250-57) has 3 round holes. \\ The L1971-76 version (16250-57) has 2 slotted holes and 1 round hole in the center and can be used on 57-76 motors. \\ The 77-85 version (16250-57) doesn't tie back to the frame and Can't Be Used On 57-76 Motors. \\ [[techtalk:ih:engmech09|Reference IH Motor Mount Page]] | ||
| - | * **Example 3**: 2000-2003 crankshafts (23905-00) were only sold as an assembly (you couldn't buy individual parts for it). \\ However, the rods in the 2003 assemblies are reportedly thinner than in the 00-02 assembly and carry -02 casting numbers. ((Randy_rots of the XLFORUM http://xlforum.net/forums/showthread.php?t=1949239&page=34)). \\ [[techtalk:evo:engmech01#flywheels|Reference Evo Flywheel section]] | + | * **Example 3**: 2000-2003 crankshafts (23905-00) were only sold as an assembly (you couldn't buy individual parts for it). \\ However, the rods in the 2003 assemblies are reportedly thinner than in the 00-02 assembly and carry -02 casting numbers. ((Randy_rots of the XLFORUM https://www.xlforum.net/forum/forum-functions/sportsterpedia-com-admin/181086-sportsterpedia-progress/page34?t=1949239&page=34)). \\ [[techtalk:evo:engmech01#flywheels|Reference Evo Flywheel section]] |
| * **Many replacement "assemblies" are built with newer parts and the assembly fits older models but the individual parts won't interchange with older ones**. \\ The parts in these type assemblies are generally not sold individually (don't want anybody mixing parts that might ruin the assembly). \\ Some of the parts in the new assembly may actually be the same as the older parts. \\ But if one or more of the newer parts used are not compatible with older ones, individual parts are not listed for the assembly. | * **Many replacement "assemblies" are built with newer parts and the assembly fits older models but the individual parts won't interchange with older ones**. \\ The parts in these type assemblies are generally not sold individually (don't want anybody mixing parts that might ruin the assembly). \\ Some of the parts in the new assembly may actually be the same as the older parts. \\ But if one or more of the newer parts used are not compatible with older ones, individual parts are not listed for the assembly. | ||
| * **Example**: 1977-E1983 oil pumps had 3 part number changes in that year span but all the parts would still interchange between them. \\ However, in L1983 the MoCo built a new oil pump assembly (26197-83) with the same parts except the gerotors were cut different on their OD. \\ Due to that change, the older gerotor sets could be used (77-85) but the L83-85 gerotors will bind/break in a 77-E83 pump body. \\ So up into further years, the older parts were still sold. But the parts in the newer assembly were not sold individually. \\ It wasn't until the MoCo obsoleted the older parts that individual parts could be bought for the L83-85 oil pump. \\ [[techtalk:ih:oil03a#late_1983_oil_pump_assembly_design_modification|Reference Late 1983 oil pump assembly design modification]] | * **Example**: 1977-E1983 oil pumps had 3 part number changes in that year span but all the parts would still interchange between them. \\ However, in L1983 the MoCo built a new oil pump assembly (26197-83) with the same parts except the gerotors were cut different on their OD. \\ Due to that change, the older gerotor sets could be used (77-85) but the L83-85 gerotors will bind/break in a 77-E83 pump body. \\ So up into further years, the older parts were still sold. But the parts in the newer assembly were not sold individually. \\ It wasn't until the MoCo obsoleted the older parts that individual parts could be bought for the L83-85 oil pump. \\ [[techtalk:ih:oil03a#late_1983_oil_pump_assembly_design_modification|Reference Late 1983 oil pump assembly design modification]] | ||
