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techtalk:ih:engmech03 [2019/06/12 03:11] hippysmack [79-85 models] |
techtalk:ih:engmech03 [2023/12/27 03:13] hippysmack |
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| ===== Head Sets with Year Changes ===== | ===== Head Sets with Year Changes ===== | ||
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| The chart below, with head part numbers, is a compilation of parts catalogs and shows when the changes occurred and to which year models the changes affected. ((1952-1957 HD Spare Parts Catalog for all Sportster and K Models pg 6)) ((1952-1959 HD Spare Parts Catalog for all Sportster and K Models pg 5)) ((1959-1960 HD Supplement to Spare Parts Catalog for Sportster and K Models)) ((1959-1961 HD Supplement to Spare Parts Catalog for Sportster and K Models)) ((1959-1962 HD Supplement to Spare Parts Catalog for Sportster and K Models)) ((1963 HD Parts Catalog for Sportster and KH Models)) ((1964 HD Supplement to Spare Parts Catalog for Sportster and KH Models)) \\ ((1955-1965 HD Sportster and KH Model Parts Catalog)) ((1966 HD Sportster and KH Model Parts Catalog Supplement)) ((1957-1967 HD Sportster and KH Model Parts Catalog)) ((1967-68 HD Sportster and KH Model Parts Catalog Supplement)) ((1959-1969 HD Sportster Parts Catalog)) ((1961-1971 HD Sportster Parts Catalog)) ((1961-1972 HD Sportster Parts Catalog Supplement)) ((1962-1973 HD Sportster Parts Catalog)) ((1962-1974 HD Sportster Parts Catalog Supplement)) ((1962-1976 HD Sportster Parts Catalog Supplement)) ((1954-1977 HD Sportster Parts Catalog Supplement)) ((1954-1978 HD Sportster Parts Catalog Supplement)) ((1954-1978 HD Sportster Parts Catalog (99451-78A) )) ((1954-1978 HD Sportster Parts Catalog (99451-78B) )) ((1979 HD Sportster Parts Catalog (99451-79)) ((1979 HD Sportster Parts Catalog (99451-79A)) ((1979-1981 HD Sportster Parts Catalog)) ((1979-1980 HD Sportster Parts Catalog)) ((1979-1982 HD Sportster Parts Catalog)) ((1979-1983 HD Sportster Parts Catalog)) ((1979-1985 HD Sportster Parts Catalog)) | The chart below, with head part numbers, is a compilation of parts catalogs and shows when the changes occurred and to which year models the changes affected. ((1952-1957 HD Spare Parts Catalog for all Sportster and K Models pg 6)) ((1952-1959 HD Spare Parts Catalog for all Sportster and K Models pg 5)) ((1959-1960 HD Supplement to Spare Parts Catalog for Sportster and K Models)) ((1959-1961 HD Supplement to Spare Parts Catalog for Sportster and K Models)) ((1959-1962 HD Supplement to Spare Parts Catalog for Sportster and K Models)) ((1963 HD Parts Catalog for Sportster and KH Models)) ((1964 HD Supplement to Spare Parts Catalog for Sportster and KH Models)) \\ ((1955-1965 HD Sportster and KH Model Parts Catalog)) ((1966 HD Sportster and KH Model Parts Catalog Supplement)) ((1957-1967 HD Sportster and KH Model Parts Catalog)) ((1967-68 HD Sportster and KH Model Parts Catalog Supplement)) ((1959-1969 HD Sportster Parts Catalog)) ((1961-1971 HD Sportster Parts Catalog)) ((1961-1972 HD Sportster Parts Catalog Supplement)) ((1962-1973 HD Sportster Parts Catalog)) ((1962-1974 HD Sportster Parts Catalog Supplement)) ((1962-1976 HD Sportster Parts Catalog Supplement)) ((1954-1977 HD Sportster Parts Catalog Supplement)) ((1954-1978 HD Sportster Parts Catalog Supplement)) ((1954-1978 HD Sportster Parts Catalog (99451-78A) )) ((1954-1978 HD Sportster Parts Catalog (99451-78B) )) ((1979 HD Sportster Parts Catalog (99451-79)) ((1979 HD Sportster Parts Catalog (99451-79A)) ((1979-1981 HD Sportster Parts Catalog)) ((1979-1980 HD Sportster Parts Catalog)) ((1979-1982 HD Sportster Parts Catalog)) ((1979-1983 HD Sportster Parts Catalog)) ((1979-1985 HD Sportster Parts Catalog)) | ||
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| |(F) **16673-84** \\ (R) **16674-84**|:::|L1985| | |(F) **16673-84** \\ (R) **16674-84**|:::|L1985| | ||
| ===== Head Identification ===== | ===== Head Identification ===== | ||
| - | 4 steps to head identification just from site plus head bolt spacing: ((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?p=5133944)) | + | 4 steps to head identification just from site plus head bolt spacing: ((Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/174896-pictorial-guide-for-identifying-heads#post5133944)) |
| - | |**1a**. If these fins are present, your looking at 900 heads \\ for sure. In later 71 these fins disappeared. \\ That means:((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?p=5133944))|**1b**. There are some 900 heads that didnt have those fins and no 1000 heads have these fins. If no fins go to step 2.((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?p=5133944))|**2a**. Decide if the heads are later 71 (900) or 1000. \\ Do that by looking at oil drain size \\ Note the size of drain compared to head bolt holes.((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?p=5133944))| | + | |**1a**. If these fins are present, your looking at 900 heads \\ for sure. In later 71 these fins disappeared. \\ That means:((Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/174896-pictorial-guide-for-identifying-heads#post5133944))|**1b**. There are some 900 heads that didnt have those fins and no 1000 heads have these fins. If no fins go to step 2.((Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/174896-pictorial-guide-for-identifying-heads#post5133944))|**2a**. Decide if the heads are later 71 (900) or 1000. \\ Do that by looking at oil drain size \\ Note the size of drain compared to head bolt holes.((Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/174896-pictorial-guide-for-identifying-heads#post5133944))| |
| - | |{{:techtalk:ih:engmech:head_id_1_by_dr_dick.jpg?direct&300|}} \\ 1957-71 bolt pattern ( inside of hole to inside of hole, diagonally ) is 3.440". \\ 57-mid 73,threads for head bolts, come all the way up to the head gasket surface on the cylinders.((brucstoudt of the XLFORUM http://xlforum.net/forums/showthread.php?p=4022291))|{{:techtalk:ih:engmech:head_id_2_by_dr_dick.jpg?direct&300|}}|{{:techtalk:ih:engmech:head_id_3_by_dr_dick.jpg?direct&300|}}| | + | |{{:techtalk:ih:engmech:head_id_1_by_dr_dick.jpg?direct&300|}} \\ 1957-71 bolt pattern ( inside of hole to inside of hole, diagonally ) is 3.440". \\ 57-mid 73,threads for head bolts, come all the way up to the head gasket surface on the cylinders.((brucstoudt of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/137946-cylinder-head-bolt-spacing#post4022291))|{{:techtalk:ih:engmech:head_id_2_by_dr_dick.jpg?direct&300|}}|{{:techtalk:ih:engmech:head_id_3_by_dr_dick.jpg?direct&300|}}| |
| - | |**2b**. 1000 uses 3/16" oil drains. Now you know if your \\ looking at late 1971 900 (big drains) or 1000 \\ (small drains). If heads have small drains go to step \\ 3 to determine if heads are E1000 (72-E73) \\ or L1000 (L73-78). ((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?p=5133944)) When the change to 1000 happened in 72 the cylinders casting size was increased but for augments sake the head casting was not. Consider the cylinders: The bore was opened .094" radius. That pushed to the oil holes in cylinder to a larger pattern. To get the matching larger pattern in the old heads, the holes needed to be reduced in size so they still fit in the 900 size casting.((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1876615&page=2)) |**3a**. E1000 (72-E73) On 900 heads (smallest bolt circle), the bolt holes bulls-eye the casting boss. Looking close at the 72 heads you can see the bolt circle was slightly enlarged while the casting boss stayed at the original position. ((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?p=5133944))|**3b**. L1000 (L73-78). In later 73 the 1000 heads change to bigger bolt pattern.((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?p=5133944)) The L73+ heads have the spot facing further out on the casting boss. In other words, the PCD of the spot facing is greater than on the 72/e73 heads. ((Scuba10jdl)) In L73 the bolt circle was really enlarged. Again the boss stayed at the 900 position. There is added meat around the bolt holes between the fins but that's a moot point in identifying what year heads your gawking at. ((DR Dick))| | + | |**2b**. 1000 uses 3/16" oil drains. Now you know if your \\ looking at late 1971 900 (big drains) or 1000 \\ (small drains). If heads have small drains go to step \\ 3 to determine if heads are E1000 (72-E73) \\ or L1000 (L73-78). ((Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/174896-pictorial-guide-for-identifying-heads#post5133944)) When the change to 1000 happened in 72 the cylinders casting size was increased but for augments sake the head casting was not. Consider the cylinders: The bore was opened .094" radius. That pushed to the oil holes in cylinder to a larger pattern. To get the matching larger pattern in the old heads, the holes needed to be reduced in size so they still fit in the 900 size casting.((Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/174896-pictorial-guide-for-identifying-heads/page2?t=1876615&page=2)) |**3a**. E1000 (72-E73) On 900 heads (smallest bolt circle), the bolt holes bulls-eye the casting boss. Looking close at the 72 heads you can see the bolt circle was slightly enlarged while the casting boss stayed at the original position. ((Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/174896-pictorial-guide-for-identifying-heads#post5133944))|**3b**. L1000 (L73-78). In later 73 the 1000 heads change to bigger bolt pattern.((Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/174896-pictorial-guide-for-identifying-heads#post5133944)) The L73+ heads have the spot facing further out on the casting boss. In other words, the PCD of the spot facing is greater than on the 72/e73 heads. ((Scuba10jdl)) In L73 the bolt circle was really enlarged. Again the boss stayed at the 900 position. There is added meat around the bolt holes between the fins but that's a moot point in identifying what year heads your gawking at. ((DR Dick))| |
| - | |{{:techtalk:ih:engmech:head_id_4_by_dr_dick.jpg?direct&300|}}|{{:techtalk:ih:engmech:head_id_5_by_dr_dick.jpg?direct&300|}} \\ 72-mid 73 1000 bolt pattern ( inside of hole to inside of hole, diagonally ) is 3.540".((brucstoudt of the XLFORUM http://xlforum.net/forums/showthread.php?p=4022291))|{{:techtalk:ih:engmech:head_id_6_by_dr_dick.jpg?direct&300|}} \\ L73 - 85 bolt pattern ( inside of hole to inside of hole, diagonally ) is 3.640". Late 73-85 threads for head bolts are recessed in the cylinders by 1/2''((brucstoudt of the XLFORUM http://xlforum.net/forums/showthread.php?p=4022291)) | | + | |{{:techtalk:ih:engmech:head_id_4_by_dr_dick.jpg?direct&300|}}|{{:techtalk:ih:engmech:head_id_5_by_dr_dick.jpg?direct&300|}} \\ 72-mid 73 1000 bolt pattern ( inside of hole to inside of hole, diagonally ) is 3.540".((brucstoudt of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/137946-cylinder-head-bolt-spacing#post4022291))|{{:techtalk:ih:engmech:head_id_6_by_dr_dick.jpg?direct&300|}} \\ L73 - 85 bolt pattern ( inside of hole to inside of hole, diagonally ) is 3.640". Late 73-85 threads for head bolts are recessed in the cylinders by 1/2''((brucstoudt of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/137946-cylinder-head-bolt-spacing#post4022291)) | |
| - | |**4**. In 79 a boss was added for a/c mounting. This is a 79 only head. 1980-1983 is same as 1979 but doesn't have the intake o-ring lip. 84-85 had no intake o-ring lip either. The air cleaner boss was still present but it wasn't drilled or tapped.((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?p=5133944))|84-85 heads also had the shoulder-less valve guides and took a small washer for the inner valve spring instead of the full size lower spring collar the previous heads used. The valve guides do require machining if you want to use a seal the top spring collar will contact them. ((mct496 of the XLFORUM http://xlforum.net/forums/showthread.php?p=5133944)) While this info is accurate, don't let missing guides or incorrect vintage guide installation influence you in identifying what heads you are looking at. ((Dr Dick))| | + | |**4**. In 79 a boss was added for a/c mounting. This is a 79 only head. 1980-1983 is same as 1979 but doesn't have the intake o-ring lip. 84-85 had no intake o-ring lip either. The air cleaner boss was still present but it wasn't drilled or tapped.((Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/174896-pictorial-guide-for-identifying-heads#post5133944))|84-85 heads also had the shoulder-less valve guides and took a small washer for the inner valve spring instead of the full size lower spring collar the previous heads used. The valve guides do require machining if you want to use a seal the top spring collar will contact them. ((mct496 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/174896-pictorial-guide-for-identifying-heads#post5133944)) While this info is accurate, don't let missing guides or incorrect vintage guide installation influence you in identifying what heads you are looking at. ((Dr Dick))| |
| |{{:techtalk:ih:engmech:head_id_7_by_dr_dick.jpg?direct&300|}}|{{:techtalk:ih:engmech:84-85_valve_guides_by_mct496.jpg?direct&300|}}| | |{{:techtalk:ih:engmech:head_id_7_by_dr_dick.jpg?direct&300|}}|{{:techtalk:ih:engmech:84-85_valve_guides_by_mct496.jpg?direct&300|}}| | ||
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| |{{:techtalk:ih:engmech:1969_heads_by_monte03.jpg?direct&400|}}| | |{{:techtalk:ih:engmech:1969_heads_by_monte03.jpg?direct&400|}}| | ||
| - | | 1969 Iron Heads ((photo by Monte03 of the XLFORUM http://xlforum.net/forums/showthread.php?t=166440&page=6)) | | + | | 1969 Iron Heads ((photo by Monte03 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/46089-identifying-cylinder-heads/page6?t=166440&page=6)) | |
| ====== Valves ====== | ====== Valves ====== | ||
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| ===== Intake Valves and Components with Year Changes ===== | ===== Intake Valves and Components with Year Changes ===== | ||
| The chart below, with valve component part numbers, is a compilation of parts catalogs and shows when the changes occurred and to which year models the changes affected. ((1952-1957 HD Spare Parts Catalog for all Sportster and K Models pg 6)) ((1952-1959 HD Spare Parts Catalog for all Sportster and K Models pg 5)) ((1959-1960 HD Supplement to Spare Parts Catalog for Sportster and K Models)) ((1959-1961 HD Supplement to Spare Parts Catalog for Sportster and K Models)) ((1959-1962 HD Supplement to Spare Parts Catalog for Sportster and K Models)) ((1963 HD Parts Catalog for Sportster and KH Models)) ((1964 HD Supplement to Spare Parts Catalog for Sportster and KH Models)) \\ ((1955-1965 HD Sportster and KH Model Parts Catalog)) ((1966 HD Sportster and KH Model Parts Catalog Supplement)) ((1957-1967 HD Sportster and KH Model Parts Catalog)) ((1967-68 HD Sportster and KH Model Parts Catalog Supplement)) ((1959-1969 HD Sportster Parts Catalog)) ((1961-1971 HD Sportster Parts Catalog)) ((1961-1972 HD Sportster Parts Catalog Supplement)) ((1962-1973 HD Sportster Parts Catalog)) ((1962-1974 HD Sportster Parts Catalog Supplement)) ((1962-1976 HD Sportster Parts Catalog Supplement)) ((1954-1977 HD Sportster Parts Catalog Supplement)) ((1954-1978 HD Sportster Parts Catalog Supplement)) ((1954-1978 HD Sportster Parts Catalog (99451-78A) )) ((1954-1978 HD Sportster Parts Catalog (99451-78B) )) ((1979 HD Sportster Parts Catalog (99451-79)) ((1979 HD Sportster Parts Catalog (99451-79A)) ((1979-1981 HD Sportster Parts Catalog)) ((1979-1980 HD Sportster Parts Catalog)) ((1979-1982 HD Sportster Parts Catalog)) ((1979-1983 HD Sportster Parts Catalog)) ((1979-1985 HD Sportster Parts Catalog)) \\ | The chart below, with valve component part numbers, is a compilation of parts catalogs and shows when the changes occurred and to which year models the changes affected. ((1952-1957 HD Spare Parts Catalog for all Sportster and K Models pg 6)) ((1952-1959 HD Spare Parts Catalog for all Sportster and K Models pg 5)) ((1959-1960 HD Supplement to Spare Parts Catalog for Sportster and K Models)) ((1959-1961 HD Supplement to Spare Parts Catalog for Sportster and K Models)) ((1959-1962 HD Supplement to Spare Parts Catalog for Sportster and K Models)) ((1963 HD Parts Catalog for Sportster and KH Models)) ((1964 HD Supplement to Spare Parts Catalog for Sportster and KH Models)) \\ ((1955-1965 HD Sportster and KH Model Parts Catalog)) ((1966 HD Sportster and KH Model Parts Catalog Supplement)) ((1957-1967 HD Sportster and KH Model Parts Catalog)) ((1967-68 HD Sportster and KH Model Parts Catalog Supplement)) ((1959-1969 HD Sportster Parts Catalog)) ((1961-1971 HD Sportster Parts Catalog)) ((1961-1972 HD Sportster Parts Catalog Supplement)) ((1962-1973 HD Sportster Parts Catalog)) ((1962-1974 HD Sportster Parts Catalog Supplement)) ((1962-1976 HD Sportster Parts Catalog Supplement)) ((1954-1977 HD Sportster Parts Catalog Supplement)) ((1954-1978 HD Sportster Parts Catalog Supplement)) ((1954-1978 HD Sportster Parts Catalog (99451-78A) )) ((1954-1978 HD Sportster Parts Catalog (99451-78B) )) ((1979 HD Sportster Parts Catalog (99451-79)) ((1979 HD Sportster Parts Catalog (99451-79A)) ((1979-1981 HD Sportster Parts Catalog)) ((1979-1980 HD Sportster Parts Catalog)) ((1979-1982 HD Sportster Parts Catalog)) ((1979-1983 HD Sportster Parts Catalog)) ((1979-1985 HD Sportster Parts Catalog)) \\ | ||
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| ^**Intake Group**^ ^**1957-1959 XL** \\ **1958 XLC**^ ^**1958-1969 XLH/XLCH**^ ^**1970-1979 XLH/XLCH**^ ^**1980-1985 XL / XLS / XLX**^ | ^**Intake Group**^ ^**1957-1959 XL** \\ **1958 XLC**^ ^**1958-1969 XLH/XLCH**^ ^**1970-1979 XLH/XLCH**^ ^**1980-1985 XL / XLS / XLX**^ | ||
| - | |**Valve**^ |18070-57 \\ 1-11/16" Dia \\ (1.6875") ((HD Service Bulletin #392 dated 11-27-1957))^ |18070-58 \\ 1-13/16" Dia \\ (1.8125) ((HD Service Bulletin #392 dated 11-27-1957))^ |18070-70 \\ (1.937") ((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1946196))^ |18070-70 (**last use in 80**) \\ 18027-80 (Nittan) \\ 18028-80 (Eaton) \\ (1.937") ((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1946196)) \\ **either brand is standard** \\ **for 79-85**| | + | |**Valve**^ |18070-57 \\ 1-11/16" Dia \\ (1.6875") ((HD Service Bulletin #392 dated 11-27-1957))^ |18070-58 \\ 1-13/16" Dia \\ (1.8125) ((HD Service Bulletin #392 dated 11-27-1957))^ |18070-70 \\ (1.937") ((Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/180811-weird-valve-sizes?t=1946196))^ |18070-70 (**last use in 80**) \\ 18027-80 (Nittan) \\ 18028-80 (Eaton) \\ (1.937") ((Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/180811-weird-valve-sizes?t=1946196)) \\ **either brand is standard** \\ **for 79-85**| |
| - | |:::^ | ^ | ^ |18027-80 (Nittan) \\ 18028-80 (Eaton) \\ (1.937") ((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1946196)) \\ **either brand is standard** \\ (**added in 81**) \\ (**replacement for 1979**)^ | | | + | |:::^ | ^ | ^ |18027-80 (Nittan) \\ 18028-80 (Eaton) \\ (1.937") ((Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/180811-weird-valve-sizes?t=1946196)) \\ **either brand is standard** \\ (**added in 81**) \\ (**replacement for 1979**)^ | | |
| |**Valve Guide**^ |18176-57 (Std) \\ 18179-57 (.001" OS) \\ 18180-57 (.002" OS) \\ (**replaced in '59 by ↓**)^ |18176-57 (Std) \\ 18179-57 (.001" OS) \\ 18180-57 (.002" OS) \\ (**replaced in '59 by ↓**)^ |18176-57A (Std) \\ 18179-57A (.001" OS) \\ 18180-57A (.002" OS) \\ (**replaced in '80 by ↓**)^ |18176-80 (Std) (**80 only**) \\ 18176-57B (Std) (**80**) \\ 18179-57B (.001" OS) \\ 18180-57B (.002" OS) \\ 18191-79 (.004" OS) (**81**) \\ (**shouldered valve guides**) \\ (**All replaced in '83 by ↓**)| | |**Valve Guide**^ |18176-57 (Std) \\ 18179-57 (.001" OS) \\ 18180-57 (.002" OS) \\ (**replaced in '59 by ↓**)^ |18176-57 (Std) \\ 18179-57 (.001" OS) \\ 18180-57 (.002" OS) \\ (**replaced in '59 by ↓**)^ |18176-57A (Std) \\ 18179-57A (.001" OS) \\ 18180-57A (.002" OS) \\ (**replaced in '80 by ↓**)^ |18176-80 (Std) (**80 only**) \\ 18176-57B (Std) (**80**) \\ 18179-57B (.001" OS) \\ 18180-57B (.002" OS) \\ 18191-79 (.004" OS) (**81**) \\ (**shouldered valve guides**) \\ (**All replaced in '83 by ↓**)| | ||
| |:::^ |18176-57A (Std) \\ 18179-57A (.001" OS) \\ 18180-57A (.002" OS)^ |18176-57A (Std) \\ 18179-57A (.001" OS) \\ 18180-57A (.002" OS) ^ |18176-57B (Std) \\ 18179-57B (.001" OS) \\ 18180-57B (.002" OS) \\ 18191-79 (.004“ OS) (**81**) \\ (**shouldered valve guides**) \\ (**for 79-82**)^ |18176-57C (Std) \\ 18179-57C (.001" OS) \\ 18180-57C (.002" OS) \\ 18191-79A (.004" OS) \\ (**shoulder-less valve guides**) \\ (**for 79-85**)\\ \\ See also \\ [[techtalk:ih:engmech03f#valve_guide_changes|1983 Valve Guide Changes]]| | |:::^ |18176-57A (Std) \\ 18179-57A (.001" OS) \\ 18180-57A (.002" OS)^ |18176-57A (Std) \\ 18179-57A (.001" OS) \\ 18180-57A (.002" OS) ^ |18176-57B (Std) \\ 18179-57B (.001" OS) \\ 18180-57B (.002" OS) \\ 18191-79 (.004“ OS) (**81**) \\ (**shouldered valve guides**) \\ (**for 79-82**)^ |18176-57C (Std) \\ 18179-57C (.001" OS) \\ 18180-57C (.002" OS) \\ 18191-79A (.004" OS) \\ (**shoulder-less valve guides**) \\ (**for 79-85**)\\ \\ See also \\ [[techtalk:ih:engmech03f#valve_guide_changes|1983 Valve Guide Changes]]| | ||
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| ^**Exhaust Group**^ ^**1957-1959 XL** \\ **1958 XLC**^ ^**1958-1969 XLH/XLCH**^ ^**1970-1979 XLH/XLCH**^ ^**1980-1985 XL / XLS / XLX**^ | ^**Exhaust Group**^ ^**1957-1959 XL** \\ **1958 XLC**^ ^**1958-1969 XLH/XLCH**^ ^**1970-1979 XLH/XLCH**^ ^**1980-1985 XL / XLS / XLX**^ | ||
| - | |**Valve**^ |18080-57 \\ 1-1/2" Dia \\ (1.5000") ((Listed to standard size from this article by Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1946196))^ |18080-58 \\ 1-9/16" Dia \\ (1.5625") ((Listed to standard size from this article by Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1946196)) \\ (**58-62 XLH**) \\ (**58-61 XLCH**) \\ (**obsolete for 63**)^ |18080-58A \\ 1-9/16" Dia \\ (1.5625") ((Listed to standard size from this article by Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1946196)) ^ |18080-58B (**last use in 80**) \\ 18033-80 (Nittan) (**81**) \\ 18036-80 (Eaton) (**81**) \\ 1-9/16" Dia \\ (1.5625") ((Listed to standard size from this article by Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1946196)) \\ **either brand is standard** \\ **for 79-85**| | + | |**Valve**^ |18080-57 \\ 1-1/2" Dia \\ (1.5000") ((Listed to standard size from this article by Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/180811-weird-valve-sizes?t=1946196))^ |18080-58 \\ 1-9/16" Dia \\ (1.5625") ((Listed to standard size from this article by Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/180811-weird-valve-sizes?t=1946196)) \\ (**58-62 XLH**) \\ (**58-61 XLCH**) \\ (**obsolete for 63**)^ |18080-58A \\ 1-9/16" Dia \\ (1.5625") ((Listed to standard size from this article by Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/180811-weird-valve-sizes?t=1946196)) ^ |18080-58B (**last use in 80**) \\ 18033-80 (Nittan) (**81**) \\ 18036-80 (Eaton) (**81**) \\ 1-9/16" Dia \\ (1.5625") ((Listed to standard size from this article by Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/180811-weird-valve-sizes?t=1946196)) \\ **either brand is standard** \\ **for 79-85**| |
| - | |:::^ |:::^ |18080-58A \\ 1-9/16" Dia \\ (1.5625") ((Listed to standard size from this article by Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1946196)) \\ (**63 and up XLH**) \\ (**62 and up XLCH**) \\ (**58 and up replacement**)^ |18033-80 (Nittan) \\ 18036-80 (Eaton) \\ 1-9/16" Dia \\ (1.5625") ((Listed to standard size from this article by Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1946196)) \\ **either brand is standard** \\ (**added in 81**) \\ (**replacement for 1979**)^ | | | + | |:::^ |:::^ |18080-58A \\ 1-9/16" Dia \\ (1.5625") ((Listed to standard size from this article by Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/180811-weird-valve-sizes?t=1946196)) \\ (**63 and up XLH**) \\ (**62 and up XLCH**) \\ (**58 and up replacement**)^ |18033-80 (Nittan) \\ 18036-80 (Eaton) \\ 1-9/16" Dia \\ (1.5625") ((Listed to standard size from this article by Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/180811-weird-valve-sizes?t=1946196)) \\ **either brand is standard** \\ (**added in 81**) \\ (**replacement for 1979**)^ | | |
| |**Valve Guide**^ |18170-57 (Std) \\ 18171-57 (.001" OS) \\ 18172-57 (.002" OS)^ |18170-57 (Std) \\ 18171-57 (.001" OS) \\ 18172-57 (.002" OS)^ |18170-57 (Std) \\ 18171-57 (.001" OS) \\ 18172-57 (.002" OS) \\ (**replaced in '80 by ↓**)^ |18170-80 (Std) (**80 only**) \\ 18170-57A (Std) (**80**) \\ 18171-57A (.001" OS) \\ 18172-57A (.002" OS) \\ 18168-79 (.004" OS) (**81**) \\ (**for 79-82**) \\ (**shouldered valve guides**) \\ (**All replaced in '83 by ↓**)| | |**Valve Guide**^ |18170-57 (Std) \\ 18171-57 (.001" OS) \\ 18172-57 (.002" OS)^ |18170-57 (Std) \\ 18171-57 (.001" OS) \\ 18172-57 (.002" OS)^ |18170-57 (Std) \\ 18171-57 (.001" OS) \\ 18172-57 (.002" OS) \\ (**replaced in '80 by ↓**)^ |18170-80 (Std) (**80 only**) \\ 18170-57A (Std) (**80**) \\ 18171-57A (.001" OS) \\ 18172-57A (.002" OS) \\ 18168-79 (.004" OS) (**81**) \\ (**for 79-82**) \\ (**shouldered valve guides**) \\ (**All replaced in '83 by ↓**)| | ||
| |:::^ | ^ | ^ |18170-57A (Std) \\ 18171-57A (.001” OS) \\ 18172-57A (.002“ OS) \\ 18168-79 (.004” OS) (**81**) \\ (**shouldered valve guides**) \\ (**for 79-82**)^ |18170-57B (Std) \\ 18171-57B (.001” OS) \\ 18172-57B (.002“ OS) \\ 18168-79A (.004" OS) \\ (**shoulder-less valve guides**) \\ (**for 79-85**) \\ See also \\ [[techtalk:ih:engmech03f#valve_guide_changes|1983 Valve Guide Changes]]| | |:::^ | ^ | ^ |18170-57A (Std) \\ 18171-57A (.001” OS) \\ 18172-57A (.002“ OS) \\ 18168-79 (.004” OS) (**81**) \\ (**shouldered valve guides**) \\ (**for 79-82**)^ |18170-57B (Std) \\ 18171-57B (.001” OS) \\ 18172-57B (.002“ OS) \\ 18168-79A (.004" OS) \\ (**shoulder-less valve guides**) \\ (**for 79-85**) \\ See also \\ [[techtalk:ih:engmech03f#valve_guide_changes|1983 Valve Guide Changes]]| | ||
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| ====== Connecting Rods ====== | ====== Connecting Rods ====== | ||
| ===== Rod Play ===== | ===== Rod Play ===== | ||
| - | When checking for the up and down play, it helps to spray the crank pin area down with brake cleaner. ((brucstoudt of the XLFORUM http://xlforum.net/forums/showthread.php?t=2070383&page=5)) \\ | + | When checking for the up and down play, it helps to spray the crank pin area down with brake cleaner. ((brucstoudt of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/194181-question-for-the-ol%C2%92timers/page5?t=2070383&page=5)) \\ |
| This is to rinse down any oil that may be clinging to the roller bearings. \\ | This is to rinse down any oil that may be clinging to the roller bearings. \\ | ||
| The oil can take up space between the rollers and not give an accurate feel. \\ | The oil can take up space between the rollers and not give an accurate feel. \\ | ||
| - | However, don't forget to oil it back up before re-assembly. ((Toejam503 of the XLFORUM http://xlforum.net/forums/showthread.php?t=2070383&page=5)) \\ | + | However, don't forget to oil it back up before re-assembly. ((Toejam503 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/194181-question-for-the-ol%C2%92timers/page5?t=2070383&page=5)) \\ |
| You don't want raw metal rubbing each other on start up. \\ | You don't want raw metal rubbing each other on start up. \\ | ||
| Side shake measurement (76 and earlier models) can be done with a ruler using the outside edge of the case as a base line. \\ | Side shake measurement (76 and earlier models) can be done with a ruler using the outside edge of the case as a base line. \\ | ||
| + | |||
| ==== 57-64 models ==== | ==== 57-64 models ==== | ||
| Check rods for (up and down) play as well as (upper end side shake or rod tip) with the pistons removed from the rods. ((HD 1957-1964 FSM (dealer) pg 3C-7)) \\ | Check rods for (up and down) play as well as (upper end side shake or rod tip) with the pistons removed from the rods. ((HD 1957-1964 FSM (dealer) pg 3C-7)) \\ | ||
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| Front: 3/32" or more \\ | Front: 3/32" or more \\ | ||
| Rear: 3/32" or more \\ | Rear: 3/32" or more \\ | ||
| + | |||
| ==== 57-69 models ==== | ==== 57-69 models ==== | ||
| Check rods for (up and down) play as well as (upper end side shake or rod tip) with the pistons removed from the rods. ((HD 1959-1969 FSM (99484-69) pg 3C-7)) \\ | Check rods for (up and down) play as well as (upper end side shake or rod tip) with the pistons removed from the rods. ((HD 1959-1969 FSM (99484-69) pg 3C-7)) \\ | ||
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| Front: 11/64" or more \\ | Front: 11/64" or more \\ | ||
| Rear: 3/32" or more \\ | Rear: 3/32" or more \\ | ||
| + | |||
| ==== 76 and earlier models ==== | ==== 76 and earlier models ==== | ||
| **Motorcycles using rod bearings with steel retainers**: \\ | **Motorcycles using rod bearings with steel retainers**: \\ | ||
