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techtalk:miscres:miscres50 [2021/08/08 02:59]
hippysmack [Length of Part#s]
techtalk:miscres:miscres50 [2021/10/04 12:58] (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 ======
  
-  * **Some changes ​are subtle ​and may only require ​a letter ​added to the part number**. \\ Subtle differences may include color, texture, or construction material changes. \\ But it's not entirely accurate that a (-A) suffix is nothing more than a subtle upgrade or that it will fit your bike.  +  * **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**:​ All rigid Evo Sportster rocker boxes will bolt to the heads but some are silver ​or chromed or blacked. \\ Some of these have different prefix and suffix numbers or a combination of old and new numbers. \\ And some are the same boxes with an extra hole added to them. Slight changes sometimes just get a letter added on the end. \\ [[techtalk:​evo:​engmech04#​rocker_box_part_numbers|Reference Evo Rocker Box Page]] +    * **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 changes are due to defects found in certain parts**. \\ These changes may keep the same first 5 numbers and simply change the ending two numbers or add a letter to the end of the existing numbers. \\ Or the entire part number may change.+  * **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]] 
 +  * **Some ​part# changes are due to defects found in certain parts**. \\ These changes may keep the same first 5 numbers and simply change the ending two numbers or add a letter to the end of the existing numbers. \\ Or the entire part number may change.
       * **Example**:​ Company A makes continuous defective master cylinders. \\ The Moco may have the vendor scrap the old part and place a marking on the new improved part (with a letter added on the dash number). \\ Thus, there will a part number change differentiating (to the MoCo) where this part in their hand was made. \\ And the only change being the part number in the catalog and maybe a casting number/​letter/​symbol change. \\ Some of these type changes also included colored markings / dots etc. to help the dealerships in selecting the correct parts. \\ Since some of these changes were not external but rather internal (bore sizes for instance).       * **Example**:​ Company A makes continuous defective master cylinders. \\ The Moco may have the vendor scrap the old part and place a marking on the new improved part (with a letter added on the dash number). \\ Thus, there will a part number change differentiating (to the MoCo) where this part in their hand was made. \\ And the only change being the part number in the catalog and maybe a casting number/​letter/​symbol change. \\ Some of these type changes also included colored markings / dots etc. to help the dealerships in selecting the correct parts. \\ Since some of these changes were not external but rather internal (bore sizes for instance).
       * **Example 2**: A recall was issued for certain 78-E79 models regarding master cylinders that were fitted at the factory with a .015" over-bore. \\ The master cylinder part number (43306-78) didn't change but ones with the correct bore size were retrofitted to the affected bikes. \\ {{ pdf-bulletin:​tsb0736.pdf |Reference TSB 0736 PDF}} \\ Another problem cropped up with the -78 master with a possible tear or crack in the metal between the master cylinder outlet and the fluid reservoir. \\ A new version master was issued for L79 models (45011-77) \\ {{ pdf-bulletin:​tsb0747.pdf |Reference TSB 0747 PDF}}          * **Example 2**: A recall was issued for certain 78-E79 models regarding master cylinders that were fitted at the factory with a .015" over-bore. \\ The master cylinder part number (43306-78) didn't change but ones with the correct bore size were retrofitted to the affected bikes. \\ {{ pdf-bulletin:​tsb0736.pdf |Reference TSB 0736 PDF}} \\ Another problem cropped up with the -78 master with a possible tear or crack in the metal between the master cylinder outlet and the fluid reservoir. \\ A new version master was issued for L79 models (45011-77) \\ {{ pdf-bulletin:​tsb0747.pdf |Reference TSB 0747 PDF}}   
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   * **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]] ​
-  * **If multiple parts are under 1 part number, the number may change if any of the parts included change**. \\ Sometimes original parts are separate items. \\ Then over time, fasteners or appurtenances for the main part are bundled with it instead ​along with a part number change (for the assembly). \\ This is said to be done to simplify inventories at both the dealer and factory level. \\ Bolts or washers may prove to be weak and need to be changed to a different size or material. \\ With the main part staying the same, a new part number may be issued for the assembly coming with the upgraded bolts.+  * **Individual parts sold now may only be sold later in a bundle (with the multiple parts under 1 part number)**. \\ There are many parts that were once sold individually that was later sold instead with the hardware or other pieces needed ​for fitment. \\ This is said to be done to simplify inventories at both the dealer and factory level. \\ The number for the original part may not change but the other items will now be packaged with it. \\ Sometimes a letter will be added to the suffix to indicate the parts bundle, and others, the part number changes entirely. ​  
 +  * **If multiple parts are under 1 part number, the number may change if any of the parts included change**. \\ Bolts or washers may prove to be weak and need to be changed to a different size or material. \\ With the main part staying the same, a new part number may be issued for the assembly coming with the upgraded bolts. ​\\ Other times, it's not nuts and bolts combined but things like cams and cam cover combinations. \\ The cover fits multiple year models but the cams or pinion gear or both are not compatible with older models. 
 +  * **Some pieces of a "​kit"​ may fit multiple year models but have a more narrow year model listing due to 1 or more parts in the kit**. 
 +    * **Example**:​ The pinion shaft on 1986-1987 motors is splined and the pinion shaft on 1988-up motors is not. \\ P&A came out with a chrome cam cover kit in 1988 to fit 86-87 motors but it would not fit 88-up motors. \\ The reason given was that the included pinion gear would not work on 88-up. \\ But the cover itself was said to fit 88-up by purchasing a 88-up pinion gear (with color matched to the one from the kit). \\ {{ pdf-bulletin:​pab0384.pdf |Reference PAB 384 PDF}}
  
 ====== Prefix# Changes (first 5) ====== ====== Prefix# Changes (first 5) ======
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   * **Updates to the original part number usually show up as a letter attached to the end of the dash number (-00A)**. \\ Then future updates will usually change the "​A"​ to a "​B"​ and so on. \\ The newer dash lettered part will usually replace the original part number (but not always without additional parts replaced). \\ But then sometimes the entire part number changes and it still retros to previous year models.   * **Updates to the original part number usually show up as a letter attached to the end of the dash number (-00A)**. \\ Then future updates will usually change the "​A"​ to a "​B"​ and so on. \\ The newer dash lettered part will usually replace the original part number (but not always without additional parts replaced). \\ But then sometimes the entire part number changes and it still retros to previous year models.
     * **Example**:​ The 91-03 shifter detent plate was part# (33656-90) which was replaced with part# (33656-90A). \\ The (-90) had rounded corners separating the different gear locations and the (-90A) has sharper corners (more positive engagement). \\ However, both part numbers will work on 91-03 Sportsters without modifications. \\ [[techtalk:​ref:​svcproc11a#​associated_transmission_wear|Reference Associated Transmission Wear]]     * **Example**:​ The 91-03 shifter detent plate was part# (33656-90) which was replaced with part# (33656-90A). \\ The (-90) had rounded corners separating the different gear locations and the (-90A) has sharper corners (more positive engagement). \\ However, both part numbers will work on 91-03 Sportsters without modifications. \\ [[techtalk:​ref:​svcproc11a#​associated_transmission_wear|Reference Associated Transmission Wear]]
-  * **Not all letters in the suffix pertain to upgrades**. \\ Letters on the end may or may not correspond to an upgrade of the original part. \\ So a (-A) or (-B) version of the original part may or may not fit your bike (think master cylinder kits for different bores). \\ Letter successions for upgraded parts sometimes will simply move to the next letter (first revision = A, second revision = B and etc). \\ Sometimes the whole part number changes. \\ There are also part numbers with 2 letters added on the end (i.e. HW on fasteners). \\ But there are other letters further down the alphabet that breaks that succession rule (denoting part types / intentions) \\ For instance, some racing parts will have (-R) in the parts number suffix. \\ Novelty items had a (-V) or (-Z) ending suffix in the part number.+  * **Not all letters in the suffix pertain to upgrades**. \\ Letters on the end may or may not correspond to an upgrade of the original part. \\ So a (-A) or (-B) version of the original part may or may not fit your bike (think master cylinder kits for different bores). \\ Letter successions for upgraded parts sometimes will simply move to the next letter (first revision = A, second revision = B and etc). \\ Sometimes the whole part number changes. \\ There are also part numbers with 2 letters added on the end (i.e. HW on fasteners). \\ But there are other letters further down the alphabet that breaks that succession rule (denoting part types / intentions) \\ For instance, some racing parts will have (-R) in the parts number suffix ​or (-RA or -RB). \\ Novelty items had a (-V) or (-Z) ending suffix in the part number.
   * **Updated suffix letters may only be compatible on a later model Sportster**. \\ (with the previous lettered dash# still available for earlier models or obsoleted and not available at all even though the new lettered part is not retrofittable). \\   * **Updated suffix letters may only be compatible on a later model Sportster**. \\ (with the previous lettered dash# still available for earlier models or obsoleted and not available at all even though the new lettered part is not retrofittable). \\
   * **Some original suffix numbers used on Sportsters start out with an added update letter attached to the end**. \\ Whether that fact is due to an "oh pookie"​ moment at the factory or the part originally began life designed for a different model HD is unclear. \\ But there are, for argument sake, (-86A) numbers that are original numbers in the -86 parts catalog.   * **Some original suffix numbers used on Sportsters start out with an added update letter attached to the end**. \\ Whether that fact is due to an "oh pookie"​ moment at the factory or the part originally began life designed for a different model HD is unclear. \\ But there are, for argument sake, (-86A) numbers that are original numbers in the -86 parts catalog.