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Top Fork Clamps for Sixties Narrow Bars

Top Fork Clamps for Sixties Narrow Bars

This special inline clamp made by the Japanese company Fork allows for an easy installation of the special Sixties Narrow Bars on your Classic Springer, I-Beam Springer, Hillclimb or Cannonball Leaf Spring fork. Get that super slim front end look with the combination of both.

  • for Springer fork
  • for Sixties Narrow Bars
  • fits 1936-early 1946 Big Twin, 1940-1957 45 cui/750cc
  • aluminum, black, powder-coated
  • Japan

Inline vs. Offset

Classic Springer Forks are produced for different frame rakes.

  • In the beginning, both the main tubes and the steering stem were in the same plane. This is called "inline". The rake is 0°. Of this type were all 45” Springer forks 1936-1957 and all Big Twin forks 1936-1945.
  • From 1946 onwards the Big Twins had the neck angle increased to 30°. To maintain fork inclination and ground clearance, the steering stem was tilted to the rear by 3°. We call these forks Offset -3°, they were stock on 1946-1948 Big Twins.
  • When building a bike with ≥+8” extra long forks you don’t want the steering neck so high and inclined that the bike is difficult to steer. Therefore such forks are manufactured with a positive rake, i.e. the steering stem is inclined to the front by 3°. We call these forks Offset +3°.

The sketch shows the placement of the lateral tubes and steering stem seen from the drivers place. Now it is clear, too, why there have to be three different types of top trees or handlebars for Classich Springer forks.

Item №
Version
net price*
unit
Availability in warehouse Germany
Top Fork Clamps for Sixties Narrow Bars
21-064
$572.77
kit
Go to article
* United States of America: Tax free shipping. Please check your local import fees.

See also:

Cannonball I-Beam Springer Forks

Cannonball I-Beam Springer Forks

Once upon a time when there weren’t any custom parts you could buy from your local shop, the VL fork was a very popular item because it made your Knuckle or Panhead bobber different from the next guy’s scooter. Besides you gained half an inch of length compared to 1936-up Springer forks for improved ground clearance and a more stretched look. Now it’s time to revive those days of the golden 40’s and 50’s with the Cannonball version of H-D’s VL type fork.
Manufactured just like the original, which means I-beams and connecting braces are drop forged on a huge 10 meter forge hammer. This is the only procedure that guarantees these components stand up to the job.
The problems with installing the OEM fork were the large fork stem and the handlebar mounting so the Cannonball fork is modified here. It features a Ø1” fork stem that works with the included centering collar for 1936-up ball bearings. Moreover the stem also features two Ø1” bearing seats for the use of Big Twin tapered roller bearings without any modifications. The leg tops accept the 36-up Springer inline handlebars. This makes installation a snap compared to the original counterpart.
Certificate of stability for 4-speed Big Twins thru 1986. Length is measured from axle center line to seat of lower steering head bearing.
Although these Custom forks are intended for 1936-1957 rigid frame Big Twins they can be mounted with later frames, too, provided you have/install matching frame head beariings. The builder has to consider rake, trail, overall chassis geometry, brake function, etc.
more …
Cannonball Leaf Spring Forks

Cannonball Leaf Spring Forks

The retro custom bike builder scene sometimes likes to experiment with parts of different brands on the same bike project. For example Indian parts are installed on Harleys and vice versa, with often astonishing results. Among the most positive mergings was the combination of an Indian leaf-spring fork with an H-D Big Twin rigid frame. This type of fork was used by the Wigwam in the 1910 to 1945 period which proves that this was a very successful suspension principle with excellent driving chracteristics.
Of course, the stock item doesn´t fit a Harley frame without major alterations, so W&W decided to produce its own version which allows such an installation without many difficulties. But, of course, not another quick and dirty copy with ugly welding seams and wrong rocker geometry. The Cannonball fork is a professionaly made part with a design as close as possible to its original pattern, manufactured by expert craftsmen in Italy. The first complete prototype was rigorously tested during W&W’s winter tour in Northern Canada and after that sent to the German technical authorities for a certificate of stability (included). Both tests were passed without any flaws. After that production started.
All test rides were performed with a rigid frame, 30° neck chassis, with which both handling and braking characteristics proved well balanced and stable.
The Cannonball leaf spring fork features a fork stem with two Ø1” bearing seats for the use of 1949-up Timken bearings and leg tops to accept the 36-up Springer handlebars (inline). A horizontal bracket to mount the headlamp is also there. The fork is wide enough to accept disc brake or drum brake systems. Rockers are drilled for 17 mm axles but can be enlarged to 19 mm. Neither axle, spacers nor brake are included and must be purchased or fabricated separately. Each fork is shipped preassembled to insure proper function and fitment, however, all components are bare and require painting or plating.
more …

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