Another frame id post

[FLFD7]

Hola Harley experts, Indian guy here and I’m a knucklehead about Knuckleheads. In my father’s stash is this Knucklehead frame, and I’m looking to find out what year it’s from. This’ll be a couple posts long cause of all the photos. A general overview…

IMG_3360.jpeg IMG_3362.jpeg

IMG_3359.jpeg IMG_3366.jpeg
IMG_3365.jpeg

Some detail casting numbers to follow…

[Jerry Wieland]

Frame is 1940 and the front end is newer as is the rocker clutch bracket. With all the gorilla work around the neck it is remotely possible to be an early 1941 induced rack frame but with no frame ground tab I doubt it.

Jerry

[FLFD7]

Rear axle plate, left side…

IMG_3380.jpeg

XE 7 4

Right side axle plate

IMG_3389.jpeg

XE 6 2

Left front by sidecar mount

IMG_3381.jpeg

YE 762E

[FLFD7]

Frame neck

IMG_3382.jpeg

XE 35

Front motor mount

IMG_3390.jpeg

XE 621

Rear motor mount

IMG_3386.jpeg

XE 624 2

[FLFD7]

And the forks…

IMG_3371.jpeg IMG_3370.jpeg

IMG_3358.jpeg IMG_3357.jpeg

And the casting number

IMG_3383.jpeg

TC 20TF 4

Thanks in advance for any info you can give.

Joe

[FLFD7]

Wow Jerry, thanks for the quick answer!

[dukekleman]

FLFD7,

I believe the front fork bracket to be a late 1939-1940.

Duke Kleman

[FLFD7]

So 40 frame and 40 fork, makes sense….

[otis71]

The TC 20 spring fork is later. Without looking in the book I’d guess early to mid 50s servicar.

[Jerry Wieland]

Rigid fork is welded so no older than 1943/44. Spring fork is earlier maybe correct for 1940. Jerry