Author Topic: S/A Gearbox mainshaft query ?  (Read 905 times)

Offline Stephen Foster

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S/A Gearbox mainshaft query ?
« on: 12.01. 2013 13:52 »
I have been offered the Gearbox mainshaft below .

 BSA A10 Rocket Gold Star mainshaft with 14 tooth gear, p/n 96-673313 (N.O.S) .

Would Any forum member know if by changing the gear for My existing one if this would fit a STD "Flash" G/Box please ? (S/A) .

Regards,
Steve..
I own a 1955/56 B.S.A Swinging Arm "Golden Flash" , had it since 1976 .

Online bsa-bill

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Re: S/A Gearbox mainshaft query ?
« Reply #1 on: 12.01. 2013 14:50 »
I've never actually seen any bits from a RTT2 box but believe (from forum posts) the main shaft is different due to the use of needle roller bearings, it has I believe no scroll where the standard shaft runs on a bush..
Two  things though
1. - plenty forum members who have RGS boxes will chime in with exact info.
2. - when they do perhaps they could also tell us (allright me then)  if all RGS came with RTT2 box's or did some run standard ones and further to that could did RTT box's come with standard gearing at anytime.
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 Stephen Foster

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Re: S/A Gearbox mainshaft query ?
« Reply #2 on: 12.01. 2013 15:02 »
Thanks Bill .

You are probably correct regarding the scroll .
I am almost certain that I read once that the "R.G.S" could be especially ordered with a STD Gearbox originally as opposed to the R.R.T.2 ?

Certain Someone give the definite answer ?

Steve ...
I own a 1955/56 B.S.A Swinging Arm "Golden Flash" , had it since 1976 .

Offline unclerob

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Re: S/A Gearbox mainshaft query ?
« Reply #3 on: 12.01. 2013 16:41 »
Hi, there is an excellent (and very long!) article on a US forum called 'do the ton' about a Goldstar restoration that goes into lots of detail about rrt2 gearboxes, ratios, bearings etc....think it will answer all your questions! Hopefully this link will work!, if not google the site and look for 1962 DBd etc rebuild by 'Swan'.....
 http://www.dotheton.com/forum/index.php?topic=20929.320

Offline iansoady

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Re: S/A Gearbox mainshaft query ?
« Reply #4 on: 13.01. 2013 11:59 »
Interesting (and as you say long!) thread.

However, I don't like his use of a (to use his words) "massive press " to fit the gearbox bearing. Gentle heat should be all that's needed IME.
Ian.
1962 Golden Flash (arrived)
1955 Velo Viper/Venom (departed)
2004 Triumph Tiger 955i (staying)

Offline Motoanimal

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Re: S/A Gearbox mainshaft query ?
« Reply #5 on: 07.03. 2013 16:30 »
Interesting (and as you say long!) thread.

However, I don't like his use of a (to use his words) "massive press " to fit the gearbox bearing. Gentle heat should be all that's needed IME.

Yep, fully agree! I put the bearing in the freezer overnight (dont tell the missus!) and warm the housing with a hot air gun. The bearing only needs a gentle tap to seat it.

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