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techtalk:ih:engmech01b [2021/10/27 03:04] hippysmack |
techtalk:ih:engmech01b [2023/12/19 22:49] (current) hippysmack [1975-1985 Belly Numbers] |
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| [[: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. \\ | ||
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| 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) \\ | ||
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| 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)) \\ | ||
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| ====== 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. \\ | ||
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| - | ==== 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. | ||
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| * 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. | ||
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| |{{: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 ====== | ||
