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 HOME | Harley Flathead Models | LINKS |  Bobber Republic Info Pages

Harley Flathead Models

On this page you will find an overview and outline engine specifications of Harley Flathead Models through the years.

Warning: This list is highly unofficial, notoriously incomplete, and absolutely not necessarily 100% correct. For the rest it is OK... ;o)

 

Harley Flatheads 1929 - 1931   D Models

 Year Model c.i. Compress. Type / Remarks
 1929-1931 D 45 4.3:1 Low The "three cylinder Harley"
 1929-1931 DL 45 5.0:1 High (bore x stroke 2.745" x 3.8125")
 1930-1931 DLD 45 5.0:1 High Special Sport Solo
 1929-1931 DS 45 Sidecar Version

 

Harley Flatheads 1932-1936   R Models

 Year Model c.i. Compress. Type / Remarks
 1932-1936 R 45 Low (bore x stroke 2.745" x 3.8125")
 1932-1936 RL 45 High (bore x stroke 2.745" x 3.8125")
 1932-1933 RLR 45 High Special Sport Solo
(bore x stroke 2.745" x 3.8125")
 1934-1936 RLD 45 Extra High Special Sport Solo
(bore x stroke 2.745" x 3.8125")
 1935 RLS 45 Low Sidecar Gears
(bore x stroke 2.745" x 3.8125")
 1936 RLDR 45 Extra High Competition Special
(bore x stroke 2.745" x 3.8125")

 

Harley Flatheads 1930 - 1937   V Models

 Year Model c.i. Compress. Type / Remarks
 1930-1933 V 74
 1931 VC 74
 1930-1936 VL 74 High 1213cc (bore x stroke 3.42" x 4.00")
 1934-1936 VD 74 Low Solo
 1934-1936 VDS 74 Low Sidecar Gears
 1933-1936 VLD 74 Special Sport Solo
1213cc (bore x stroke 3.42" x 4.00")
 1934 VFDS 74 Heavy Duty - Commercial
1213cc (bore x stroke 3.42" x 4.00")
 1936-1937 VH 80 Medium 1311cc (bore x stroke 3.42" x 4.25")
 1936-1937 VLH 80 High Sport Solo
1311cc (bore x stroke 3.42" x 4.25")

 

Harley Flatheads 1937 - 1952   W Models

After 1936, the 45ci Harley Model R was renamed Model W.

 Year Model c.i. Compress. Type / Remarks
 1937-1939 W 45 Low Solo
 1937-1952 WL 45 High Sport Solo
 1937-1942 WLD 45 Extra High Sport Solo
  WLDD
 1937-1940 WLDR Racer
 1941-1952 WR 45 Racing Motorcycle
 1940-1945 WLA 45 Low Solo / US Army
 & 1949-1952
 1942-1943 WLC 45 Low Solo / Canadian Army

 

Harley Flatheads 1937 - 1948   U Models

In 1937, the 74ci Harley Models V and VL were renamed U and UL, and the 80ci Models VH and VLH were renamed UH and ULH.

 Year Model c.i. Compress. Type / Remarks
 1937-1948 U 74 Medium
 1939-1940 UA 74 Low US Army
 1937-1948 UL 74 High
 1937-1939 UMG 74 New York Police
 1937-1941 UH 80 Medium 1311cc (bore x stroke 3.42" x 4.25")
 1937-1941 ULH 80 High 1311cc (bore x stroke 3.42" x 4.25")

 

Harley Flatheads 1937 - 1963   Servi Cars

 Year Model c.i. Compress. Type / Remarks
 1937-1963 G 45
 1937-1963 GA 45 With tow bar
 1937-1941 GD 45
 1937-1941 GDT 45 With tow bar

 

Harley Flatheads 1952 - 1957   K Models

 Year Model c.i. Compress. Type / Remarks
 1952- K 45 743cc (bore x stroke 2.75" x 3.8")
 1954- KH 54 883cc (bore x stroke 2.75" x 4.56")
 1955-1957 KHK 54 Predecessor of the Sportster

 

 

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