Author Topic: gearbox  (Read 485 times)

Online RDfella

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gearbox
« on: 12.08. 2018 12:15 »
Compared with modern bikes, our gearboxes are a bit slow and notchy. Well, all my BSA and Norton boxes have been. Which is why when I recently rebuild my GF I installed a roller camplate plunger instead of the original cone shaped item. The difference is amazing - positively silky changes. I don't know if they are commercially available, because I made my own after seeing a picture of one online some while ago. Well worth changing, in my view. Photo of device attached.
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'49 B31, '49 M21, '53 DOT, '58 Flash, '00 Firestorm, Weslake sprint bike.

Online bsa-bill

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Re: gearbox
« Reply #1 on: 12.08. 2018 14:33 »
yep I have one in my box, can't recall who I got it off
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All the best - Bill
1961 Flash - stock, reliable, steady, fantastic for shopping
1959 Rocket Gold Flash - blinged and tarted up  would have seizure if taken to  Tesco

Offline muskrat

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Re: gearbox
« Reply #2 on: 12.08. 2018 20:26 »
G'day RD.
Yes I've seen thosde before and reports are very good. I don't suppose you have the dimensions? I'd like to make a few.
Cheers
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'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
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Muskys Plunger A7

Offline chaterlea25

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Re: gearbox
« Reply #3 on: 12.08. 2018 20:34 »
Hi Muskie,
The drawings were on Beeza Bills (RIP) web pages
I had them on my old PC so it would take some searching to find them

John
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Offline muskrat

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Re: gearbox
« Reply #4 on: 12.08. 2018 20:43 »
Thanks John.
Now I remember that's where I saw it. http://bsa-a10.hailwood.com/bsaimprovements.html
Bloody smart bloke Beeza Bill. Taken from us way too early. My timing side roller conversion is his design.
Cheers
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'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
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Muskys Plunger A7

Offline duTch

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Re: gearbox
« Reply #5 on: 14.08. 2018 15:55 »

 Hej RD, maybe you could edit the title to be a bit more specific ?

  My Plungers' shifter is actually quite smooth and precise, but I remember reading about this roller pin a while ago- seemed like a good idea
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Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
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