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V-Twin Mfg. Replica Swingarm Frame
V-Twin Swingarm Frames are our authentic reproductions 
of FLH styles for the years listed to accept Panhead or 
Shovelhead engines, 4 Speed Transmissions, seat posts and 
round or square swing arms. Details include forged parts as 
original in neck, engine mounts, front transmission mount, top 
seat post yoke, strut and swingarm pivot mount and footboard 
mounts, as required. All stamped components are pressed 
and formed as stock.
VT No. 
Year
51-1003 1958-64
51-1006 1965-68
51-1004 1969-84
1958-64 Style accepts a 6 volt battery, early wrap around tank 
and includes footboard tabs. Neck will accept plunger type lock 
assembly. Features low seat area. 
1965-68 Style accepts a 12 volt electric start system as stock. 
Neck will accept lock assembly. 
1969-84 Style accepts a 12 volt electric system. Neck includes 
17 digit serial number boss and tab for stem padlock.
Swingarm 
Pivot Points 
Forged Steel 
as Original
51-1003
Seat 
Post 
Yoke
 51-1004
Forged Front 
Lower Motor 
Mount for 
Strength
 
51-1006
Neck 
Detail
Forged Neck is accomplished in 4 stages.
The Forging Process
In this process, the steel is first fired as red hot ingot, next huge hammers com-
pact and orient the grain structure into a rough shape of the part, subsequent 
hits form the part into its final shape, after which it is machined and heat treated 
which results in increased strength and resistance to wear.
4
3
2
 51-1004
1
 
51-1006