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Dyna gearchange

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Dyna gearchange

Posted by robert_davis1 at June 24. 2010

Just had some machine dating info returned from Chris. On the sheet my Model 20 came from the factory with a panel mount instrament and a dyna gearchange.

I'm presuming the panel mount means the panel tank instrament setup, but whats a dyna gearchange??

 

Bob

Re: Dyna gearchange

Posted by robert_davis1 at June 25. 2010

I wrote this at work and didn't remember the description accurately. Thw wording is......Dyno Footchange.....

 

Anyone know exactly what this means????

 

Bob

Re: Dyna gearchange

Posted by richard_payne at June 25. 2010

This is a very common pair of abbreviations in the factory records through the 1930s. It simply means (mag)dyno fitted and a foot change gearbox.

The record could do with a few commas; Panel tank, Dyno, Foot change....

These were all extra cost options and presumably noted for future spares supply.

Re: Dyna gearchange

Posted by robert_davis1 at June 26. 2010

Aarrgghh RATS.......here was I thinking my bike had some sort of supercharged gearchange thingy.

Presuming then from this, not all Nortons (road bikes that is, this one was a Model 18) had a Dynamo as standard and on the same tack, hand changes were still around as options. I've seen a few pics of Nortons that age with a hand change. I have a spares book for the war era Big 4 and there is a hand change lever in there as well. Must of been a die hard item.

Am I also correct in assuming at that time the hand change was fitted to the regular Norton dolls head 4 speed box. Without the dolls head because the hand change would have gone direct to the lever on the side of the gearbos which rotated the gear selector cam plate.

 

Bob

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