Table of Contents
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IH: Suspension
Front Fork Info
1957-1985 Forks
Slider Tube, Damper Tube & Spring
| Fork Parts | Length | ||
|---|---|---|---|
| 1957-1985 | Slider Tube | xxxxx-xx | |
| Damper Tube | xxxxx-xx | ||
| Spring-#Coils | xxxxx-xx | ||
Slider Lower Legs
| Model(s) | Lower Sliders Left Leg | Lower Sliders Right Leg |
|
|---|---|---|---|
| 1953-1963 1) | K/KH/XL/XLH/XLCH | 45948-52 | 45947-52 |
| 1970 and earlier 2) | XLH/XLCH | 45944-70 | 45946-70 |
| 1970 3) | XR/XLR | 45952-70R | 45951-70R |
| 1971-1972 4) | XLH/XLCH | 45944-71 | 45946-71 |
| 1973 5) | XLH/XLCH Kayaba | 45976-73 w/ disc brake bushings | 45974-73 |
| 1974 6) | XLH/XLCH | 45976-74 | 45974-73 |
| 1975-1978 7) | XLH/XLCH Showa | 46024-75 | 46025-75 |
| 1977-1978 8) | XLCR | 46026-77 | 46027-77 |
| 1978 9) | XL/XLCH | 46027-77 | 46026-77 |
| 1979 10) | XL/XLCH | 46027-79 | 46026-79 |
| Early 1979 11) | XLS | 45657-77 | 45658-77 |
| Late 1979 12) | XLS | 46027-77 | 45906-80 |
| 1980-1983 13) | All | 45912-80 | 45906-80 |
| 1984-1987 14)15) | All | 45912-84 | 45906-84 |
Fork Oil
- The MoCo specifies HD Type B or E (and respective equivalents) fork oil depending on year model.
| Year Model | Fork Oil Type | Fork Oil Amount (Wet) | Fork Oil Amount (Dry) | ||
|---|---|---|---|---|---|
| 1957-1967 all models | HD Type “B” or equivalent.16) 17) | 3 1/2 fl oz18)19) | 4 1/2 fl oz20)21) | ||
| 1968-1969 all models | HD Type “B” or equivalent.22) 23) | 4 1/2 fl oz 24)25) | 5 1/2 fl oz 26)27) | ||
| 1970-1972 all models | HD Type “B” or equivalent.28) 29) | 5 1/2 fl oz 30)31) | 6 1/2 fl oz 32)33) | ||
| 1972-1978 XR-750 | 20 weight (Ceriani forks) | ||||
| 1980 XR-750 | 10 weight (Marzocchi forks) | ||||
| 1973-1978 | HD Type “B” or equivalent.34) 35) | 5 fl oz (148cc)36)37) | 6 fl oz (177CC)38)39) | ||
| 1979-1983 all models | HD Type “E” (99884-80). 40) 41) | 5 fl oz (148cc)42)43) | 6 fl oz (177CC)44)45) | ||
| 1984-1987 all models | HD Type “E” (99884-80).46) 47) | 5.4 fl oz (160CC)48)49) 50) | 6.4 fl oz (189CC) 51)52)53) | ||
For more information on fork oil comparisons, see Fork Oil in the reference section.
1)
1953-1963 HD Sportster Parts Catalog pg 49
2)
1978 HD Sportster Parts Catalog (99451-78B) pg 103
3)
1970 HD XR/XLR Parts Catalog pg 12
4)
1978 HD Sportster Parts Catalog (99451-78B) pg 105
8)
1977 HD XLCR Parts Catalog with 1978 Supplement pg 49
15)
1986-1990 HD Sportster Parts Catalog pg 65
