Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
techtalk:ih:engmech01b [2021/10/27 02:42] – [Belly Numbers / Line Bore Numbers] hippysmacktechtalk:ih:engmech01b [2023/12/19 22:49] (current) – [1975-1985 Belly Numbers] hippysmack
Line 1: Line 1:
 [[:techtalk:menu|{{  :techtalk:gototechnicalmenu.jpg|}}]] [[:techtalk:menu|{{  :techtalk:gototechnicalmenu.jpg|}}]]
 ====== IH: Engine Mechanicals - Sub-01B ====== ====== IH: Engine Mechanicals - Sub-01B ======
 +[[techtalk:ih:engmech01c|Click Here]] to reference the Ironhead Engine Case Identification page in the Sportsterpedia. \\
 +\\
 ====== Engine Case Numbers ====== ====== Engine Case Numbers ======
 The engine VIN, also called engine number or serial number, and can be found on a pad in the "V" between the cylinders. \\ The engine VIN, also called engine number or serial number, and can be found on a pad in the "V" between the cylinders. \\
Line 8: Line 10:
 But if your frame and motor were born together the numbers will match (and possibly save you title hassles). \\ But if your frame and motor were born together the numbers will match (and possibly save you title hassles). \\
  
-There are also casting numbers as well as stamped numbers in various places on the engine and frame, but they are not motor numbers. \\ +There are also casting numbers as well as stamped numbers in various places on the engine and early frames, but they are not motor numbers. \\ 
-Casting numbers do not indicate the year of your bike, only the date the cast was made. \\+Casting numbers do not indicate the year of your bike, only the date the part was cast. \\
 For instance, on a 70s bike, there are still quite a few -52 (the first year of the K model) numbers. \\ For instance, on a 70s bike, there are still quite a few -52 (the first year of the K model) numbers. \\
 (leading the uniformed to advertise all sorts of later model parts as K model parts) \\ (leading the uniformed to advertise all sorts of later model parts as K model parts) \\
Line 17: Line 19:
  
 The casting date simply tells you the month the part was cast. This is not the same as the day the assembly was made. \\ The casting date simply tells you the month the part was cast. This is not the same as the day the assembly was made. \\
-Casting dates can help confirm that cases on a 1976 motor were not cast in 1978 for instance. \\  +Casting dates can help confirm that factory cases on a 1976 motor were not cast in 1978 for instance. \\ 
 + 
 +**1975-1985 various engine number locations**: \\
  
 1975 model casting and stamped engine numbers: ((photos courtesy of Carson S)) \\ 1975 model casting and stamped engine numbers: ((photos courtesy of Carson S)) \\
 {{:techtalk:ih:engmech:1975_sportster_various_engine_numbers_-left_case_by_carson_s.jpg?direct&300|}} {{:techtalk:ih:engmech:1975_sportster_various_engine_numbers_-right_case_by_carson_s.jpg?direct&300|}} {{:techtalk:ih:engmech:1975-e1984_sportster_various_engine_numbers_-right_bottom_case_by_carson_s.jpg?direct&300|}} \\ {{:techtalk:ih:engmech:1975_sportster_various_engine_numbers_-left_case_by_carson_s.jpg?direct&300|}} {{:techtalk:ih:engmech:1975_sportster_various_engine_numbers_-right_case_by_carson_s.jpg?direct&300|}} {{:techtalk:ih:engmech:1975-e1984_sportster_various_engine_numbers_-right_bottom_case_by_carson_s.jpg?direct&300|}} \\
  
-====== Engine Serial Numbers ======+===== 1957-1969 Engine Serial Numbers =====
  
 Noted serial numbers with their respective dates as stated in service bulletins. Noted serial numbers with their respective dates as stated in service bulletins.
Line 35: Line 39:
   * 69 XLH 9070, produced January 3, 1969 (timer weight springs changed) ((TSB# 562A dated May 1, 1969))   * 69 XLH 9070, produced January 3, 1969 (timer weight springs changed) ((TSB# 562A dated May 1, 1969))
  
-====== Engine VIN Numbers ======+===== 1970-1985 Engine VIN Numbers =====
   * A new numbering system was issued for both the engine and frame. \\ (first year referred to as a Vehicle Identification Number or VIN) \\ The same VIN number is stamped into both the engine and frame. \\ It consists of a model code, a serial number, a manufacturer's identification, and the model year. \\ The factory VIN (serial number) on the engine does not have anything to do with nor is it used for the title / registration. \\ It did serve at one time as warranty information. However, now it does suffice for at least one point of engine identification. \\ Due to folks altering these numbers from time to time, the number alone doesn't always mean anything toward the actual year/model (unless factory stamped).   * A new numbering system was issued for both the engine and frame. \\ (first year referred to as a Vehicle Identification Number or VIN) \\ The same VIN number is stamped into both the engine and frame. \\ It consists of a model code, a serial number, a manufacturer's identification, and the model year. \\ The factory VIN (serial number) on the engine does not have anything to do with nor is it used for the title / registration. \\ It did serve at one time as warranty information. However, now it does suffice for at least one point of engine identification. \\ Due to folks altering these numbers from time to time, the number alone doesn't always mean anything toward the actual year/model (unless factory stamped).
   * Motorcycles were produced in batches and the VINs were consecutive thru the different batches of different models. \\ There were no set number of same model bikes in a batch (no 50 or 100 XLH models per batch deal). \\ For instance, Service Bulletin M-736 reveals a long list of VINs produced from June 7, 1978 to June 14, 1978. \\ Also revealed in that bulletin is the fact there was a year model change within that 8 day time frame. \\ So the year model change for case production was the 2nd week in June, 1978. \\ A few numbers in-between were left out of the bulletin but the VINs start at (FX) 2A**75920**H8 and end at (XLCH) 4Al7621H9. \\ In those 8 days (6 work days) and in this order per the VIN sequence, produced were;   * Motorcycles were produced in batches and the VINs were consecutive thru the different batches of different models. \\ There were no set number of same model bikes in a batch (no 50 or 100 XLH models per batch deal). \\ For instance, Service Bulletin M-736 reveals a long list of VINs produced from June 7, 1978 to June 14, 1978. \\ Also revealed in that bulletin is the fact there was a year model change within that 8 day time frame. \\ So the year model change for case production was the 2nd week in June, 1978. \\ A few numbers in-between were left out of the bulletin but the VINs start at (FX) 2A**75920**H8 and end at (XLCH) 4Al7621H9. \\ In those 8 days (6 work days) and in this order per the VIN sequence, produced were;
Line 125: Line 129:
  
 ====== Belly Numbers / Line Bore Numbers ====== ====== Belly Numbers / Line Bore Numbers ======
-The numbers on the bottom of the cases are commonly called the "belly" numbers or "line bore" numbers. ((Moon Wolf of the XLFORUM http://xlforum.net/forums/showthread.php?t=575658&page=2)) \\+The numbers on the bottom of the cases are commonly called the "belly" numbers or "line bore" numbers. ((Moon Wolf of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/79283-case-numbers-not-vin?t=575658&page=2)) \\
 If your bike has "born together" cases, the numbers on each case half should match. \\ If your bike has "born together" cases, the numbers on each case half should match. \\
 These numbers have nothing to do with your gasket set or anything else. \\ These numbers have nothing to do with your gasket set or anything else. \\
Line 140: Line 144:
  
  
-==== 1957-1974 Belly Numbers ====+===== 1957-1974 Belly Numbers =====
 Belly numbers were coded beginning with a model digit (7) for Sportsters, year and 4-5 running sequential numbers for the year model: \\ Belly numbers were coded beginning with a model digit (7) for Sportsters, year and 4-5 running sequential numbers for the year model: \\
 Model (1 digit)-Year (last 2 digits)-Sequential No (4 or 5 digits) \\ Model (1 digit)-Year (last 2 digits)-Sequential No (4 or 5 digits) \\
 Each set of belly numbers is stamped on the bottom of each case half and the numbers should match if they were factory issued. \\ Each set of belly numbers is stamped on the bottom of each case half and the numbers should match if they were factory issued. \\
  
-{{:techtalk:ih:engmech:1974_xl_belly_numbers_by_ironheadjunkie.jpg?direct&400|}} ((photo by ironheadjunkie of the XLFORUM)) {{:techtalk:ih:engmech:1974_xlh_belly_numbers_by_the_doctor71.jpg?direct&400|}} ((photo by The Doctor71 of the XLFORUM http://xlforum.net/forums/showthread.php?t=2080305&page=2)) \\ +{{:techtalk:ih:engmech:1974_xl_belly_numbers_by_ironheadjunkie.jpg?direct&400|}} ((photo by ironheadjunkie of the XLFORUM)) {{:techtalk:ih:engmech:1974_xlh_belly_numbers_by_the_doctor71.jpg?direct&400|}} ((photo by The Doctor71 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/203115-1974-sportster-vin-issues-what-the-heck-did-i-buy?t=2080305&page=2)) \\ 
-==== 1975-1985 Belly Numbers ====+===== 1975-1985 Belly Numbers =====
 For convenience, [[techtalk:miscres:miscres70|Click Here]] to see the Julian Day Calendar page in the Misc Resources section of the Sportsterpedia. \\ You can open a pic of a full per-year calendar thru 1985 there and match your belly numbers to find the day your cases were machined. For convenience, [[techtalk:miscres:miscres70|Click Here]] to see the Julian Day Calendar page in the Misc Resources section of the Sportsterpedia. \\ You can open a pic of a full per-year calendar thru 1985 there and match your belly numbers to find the day your cases were machined.
  
Line 153: Line 157:
  
   * The model designation for 1000cc Sportsters was (7).   * The model designation for 1000cc Sportsters was (7).
-  * The right case belly number is stamped on the bottom and the left case is stamped on the outside primary wall. \\+  * Location of numbers: 
 +    * 1975-E1984: \\ The left case is stamped on the outside primary wall. \\ The right case is stamped on the bottom under the flywheels. 
 +    * L1984-1985: \\ The left case is stamped on the outside primary wall (unchanged). \\ The right case is stamped on the right side of the case (sump) below the cam cover starting with crankcase #784 044001. \\ Per TSB M-885, the locations of the right crankcase numbers were changed to aid the stamping operation. \\   
   * The Julian Day starts over on every January 1st.   * The Julian Day starts over on every January 1st.
     * Example January 1st = Julian Day #1. December 31 = Julian Day #365 of a non leap year, December 31 = 366 of a leap year. \\ This is verified thru Service Bulletin numbers 744 and 760.     * Example January 1st = Julian Day #1. December 31 = Julian Day #365 of a non leap year, December 31 = 366 of a leap year. \\ This is verified thru Service Bulletin numbers 744 and 760.
Line 169: Line 175:
 |{{:techtalk:ih:engmech:1975_xlch_belly_numbers_pic1_by_carson_s.jpg?direct&400|}}|{{:techtalk:ih:engmech:1975_xlch_belly_numbers_pic2_by_carson_s.jpg?direct&400|}}| |{{:techtalk:ih:engmech:1975_xlch_belly_numbers_pic1_by_carson_s.jpg?direct&400|}}|{{:techtalk:ih:engmech:1975_xlch_belly_numbers_pic2_by_carson_s.jpg?direct&400|}}|
  
-|  1975-1985 belly numbers on right case bottom ((photo by paulc of the XLFORUM, labeled by Hippysmack http://xlforum.net/forums/showthread.php?t=1792269))  |+|  1975-1985 belly numbers on right case bottom ((photo by paulc of the XLFORUM, labeled by Hippysmack https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/166796-left-case-belly-number-location?t=1792269))  |
 |{{:techtalk:ih:engmech:1976_xlch_belly_numbers_by_paulc.jpg?direct&400|}}| |{{:techtalk:ih:engmech:1976_xlch_belly_numbers_by_paulc.jpg?direct&400|}}|
 +
 +====== Case Match Numbers ======
  
  

Trace: