Year

1932-34

1935-36

1937-40

1941-46

1947

1948-Early 50

Late 1950-52

Transmission mount

2 holes in frame

2 holes in frame + 3rd hole in outboard right-side tab

Steering head

Key lock

Several castings, progressively heavier

Brake crossover tube

Functional

Blank

None

Clutch cable bracket on seat post

None

2 holes

3 holes

Seat post lugs for coil mount

No

Yes

Tool box mount bracket

UK

Left side

Right side

Rear brake shoe width

1" band

1" shoe

1¼" shoe

1941 "W" Type Solo Frame

1939 "W" Type Solo Frame (Courtesy of FatDog)

1932-34 "R" Type Solo Frame

Detail of Transmission/Seat Post Re-inforcement, 1950-* Frames
Notice horizontal fillet across seat post intersection

Detail of Transmission/Seat Post Re-inforcement, 1950-* Frames
Notice absence of brake crossover tube

Detail of Transmission/Seat Post Re-inforcement, 1950-* Frames
Notice vertical fillet leading from motor area to front of seat post

Click here for Harley-Davidson stroker flywheels

Knuckle, Panhead
1941-54

Pan, Shovelhead
1955-71

Shovelhead
1972-81

45 WL, trike
1937-73

74, 80” Flathead
1937-48

Sportster
1957-*

80”

84”

86”

88”

80”

84”

86”

88”

80”

4-7/16”

4-1/2”

4-5/8”

84”

86”

88”

92”

4-1/2”

4-5/8”

4-13/16”

"Harley-Davidson" name for reference purposes only. Not affiliated with Harley-Davidson Motor Co.

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