Dick Linn’s «Frankenstein»

17 Янв 2015 | Author: | Комментарии к записи Dick Linn’s «Frankenstein» отключены
BSA Prototype

After WWII, returning had developed a liking for the lightweight with rear suspension seen in England. Harley-Davidson was of this, but found their lines running at capacity the postwar demand for big twins. To this new challenge, they an alliance with one of the English to develop a lightweight machine.

At time one of the Founder’s grandchildren was at in Cambridge. It was decided to have him contact with the engineering at BSA to see if they’d be willing to help in a swing arm chassis for the proposed The staff at BSA was eager for a chance to in sorely needed American to their coffers so they the offer.


BSA had been developing a arm chassis for their competition and decided to use the Harley prototype for a bed for chassis components.

They decided that the engine received from would be a good fit but the generator have to be relocated. This was resolved by contacting Lucas and one of their new alternators to fit between the and primary drive.

This lengthening the Harley mainshaft, but the BSA shop easily managed by adapting a B33 500 mainshaft to fit the Harley They also adapted taper roller bearings to fit shaft at that time. later used this bearing setup on all their

A 4 speed transmission, which had developed for use with their new arm frame, was fitted behind the and a single row chain with sprocket was used for primary The front end was another BSA competition development, which incorporated sliders and hard chromed These were slated to be on production machines, but due to the Korean War and shortages, steel sliders substituted.

The aluminum sliders didn’t it into production until

The front brake was another from BSA’s competition This also found use on productions machines.

As for the engine, decided that they build up an engine built the reliable 45 crankcase. The cylinders/heads later to find their way the K series engines. It was decided to the displacement of the 45 to 61 inch to increase and tractability in street usage.

To do the … of the 45 was increased to 4 13/16, and the increased .070 over the 45. Although these flywheels never used in another by Harley, in later years a engineer who had worked on the project remembered these flywheels and marketing them on his own under the SS High lift/duration cams would later be used as KHK in the K models were also

They also developed a flow oil pump at this to handle the increased heat and needs of the larger engine.

It was to combine both supply and in one body to streamline design. this pump found in the later K XL series. With the pump relocated, there was for a tach drive off the rear cam. Two complete prototype were assembled at Small competition shop.

BSA Prototype

These tested on the local back of Birmingham and after some problems with the proper (the British weren’t to gearing for high torque/low engines!), the machines were to be quite impressive by the day’s They also aroused by the locals of some new type of being developed!

Unfortunately, by the time the engines had assembled and the prototypes built and the opportunity had been lost. engineers had gone ahead and the components developed for the hybrid and come up with their own frame design machine. Of it was slower and heavier, but it wasn’t with foreign components! BSA found that they have the capacity to meet for their products and make for Harley also.

So the project was Of the two prototypes, one ended up in the recesses of the museum, as Harley keeps one of machine they ever and the other lay gathering dust in a corner of BSA’s competition Finally, in 1961, one of the engineers at BSA in the project retired and bought the that BSA had. After he immigrated to the U.S. and located in New York.

There he worked part for the local BSA dealer and licensed the here. As it had never been in England, the Authorities declared it a for the year it entered the country. It was as a BSA as Harley would not recognize its

He only rode it occasionally he died.

I found the machine in a on the widow’s homestead under a of hay, with only the wheel showing. I offered her the $50.00 bucks for the pile of in the barn and she accepted. She had kept the for years as her husband had always highly of it.

She finally decided to part it after I had talked to her quite a and heard some of this She later found papers of her with the title that this little known of BSA/Harley collaboration. Click on any to see a larger view.

BSA Prototype
BSA Prototype
BSA Prototype
BSA Prototype
BSA Prototype

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