classic motorcycle forum
Motorcycle Discussions => British Bikes => Topic started by: Kuutiopää on May 26, 2019, 06:05:40 AM
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Hi,
Anyone knows which marque/s used this 4-speed Burman gearbox model AP? Thanks!
https://cybermotorcycle.com/gallery/burman/Burman-Type-AP.htm
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You have such a box ?
The NMC has a spares list for it, dated 1933 as a hand change box,
so that would narrow the field down a bit ?
http://www.nationalmotorcyclemuseum.co.uk/product/burman-gboxes-1933-illustrated-spares-type-ap-gearbox-and-clutch-hand-change-only-overhead-pivot-lug-burman955f/
There are a heck of a lot of types listed also at that link you used,
and they don't even have the common 3 speed of the 1920s.
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Thanks for the link. I think I have seen that spares list somewhere in an internet.
I have not found any photos of any motorcycle with such a gearbox.
I do have such a gearbox.
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Could your Dunelt have used it ?
Can you use it on your Dunelt. ?
If there is so little info on it, no-one can argue about it "not being right" !
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I have never seen or heard of one.....but .logically ,it is the first of the "new" series Burmans from 1930 onwards,the missing "A" from the B,and C lineup......incidentally the P means pivoted mount ,a patent of Walter Moore,while he was at Norton......BSA first infringed the patent,deeming it "fraudulent",then losing that argument,worked around it ,the first BSA having a Moore pivot was the SA A7/10 of 1954,long after the patent expired.
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Thanks for input guys.
The Dunelt T had Sturmey, two stud bottom fitting. I have an Albion 4-speed 2-stud bottom fitting, which Im going to use, if I dont find a frame and then
correct Sturmey gearbox.
I still have not found any photo of any bike with Burman AP gearbox.
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On the size of the casing,I dont see 4 speeds fitting inside......more like a 3 speed...........They made a lot of different boxes ........one time I had a big Burman 3 speed F&R,from a shunting locomotive,engine was a Ruston 4 VPH,which is a pretty big engine...........incidentally,the last manager of Burman is still living in Birmingham,and is trustee of the Burman Trust.......but I dont think they give out money to sick and ailing gearboxes............the family were quite prominent in the University of Birmingham.
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Definitely a 4 speed hand change box, fitted to New Hudson, Calthorpe and OK Supreme.
You can see a Calthorpe fitted with one at: https://www.youtube.com/watch?v=T3_XfC19FSc