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RR.T2 introduction #480744
03/10/13 7:10 pm
03/10/13 7:10 pm
Joined: Dec 2005
Posts: 534
Kansas City area
BritTwit Online content OP

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Kansas City area
Anyone know what model year the RR.T2 was first used on a production bike. Did it replace the RR.T or was there overlap? Was the RR. only used on the early (54-55)Daytona bikes?

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Re: RR.T2 introduction [Re: BritTwit] #480747
03/10/13 7:26 pm
03/10/13 7:26 pm
Joined: Dec 2005
Posts: 534
Kansas City area
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Never mind. I just remember where this info was. My early owners manual states:
"The pre-1956 Clubman's and Road Racing gearboxes were fitted with a phosphor bronze bush in the main shaft pinion sleeve".
So, I think the implication is the DBD had the RRT2, the CB/DB had the RRT.
Still not sure when and on what models the RR was used. Possibly the 54 bikes?
As far as the Daytona bikes, my BSA gear box chart shows a DAY which possibly predates the DAY.T.

Re: RR.T2 introduction [Re: BritTwit] #627661
11/28/15 10:14 am
11/28/15 10:14 am
Joined: Sep 2015
Posts: 290
Kent, England
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John Alexander Online content
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Joined: Sep 2015
Posts: 290
Kent, England
rrt2 1956

Re: RR.T2 introduction [Re: BritTwit] #628011
11/29/15 11:17 pm
11/29/15 11:17 pm
Joined: Dec 2005
Posts: 534
Kansas City area
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Thanks John

Re: RR.T2 introduction [Re: BritTwit] #628030
11/30/15 1:28 am
11/30/15 1:28 am
Joined: Nov 2011
Posts: 4,078
U.S.
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The RRT2 was introduced in Clubman and Racing models beginning with engine numbers DB.32.GS.847 and DBD34.GS.2001.

Re: RR.T2 introduction [Re: BritTwit] #711171
10/11/17 12:34 am
10/11/17 12:34 am
Joined: Jun 2016
Posts: 43
Boise, Idaho USA
T
ToolBox Dave Offline
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Joined: Jun 2016
Posts: 43
Boise, Idaho USA
Was the RRT2 the only original US spec Gold Star DBD34's clubman tranmission type shipped from BSA for years 56-63? Or did other transmissions get placed in US bound Clubman DBD34's. I know you could special order pretty much what ever you wanted. I am curious if other transmission types were used in US spec clubmans by default.


1961 BSA DBD34 Clubman
1966 Triumph T120TT
1972 Rickman 250MX


Re: RR.T2 introduction [Re: BritTwit] #711221
10/11/17 7:21 pm
10/11/17 7:21 pm
Joined: Mar 2002
Posts: 838
Earth
R
rick e. Offline
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Earth
My bet is that most all US spec clubman had SCT/ARRT gear ratios with the a STD type here and there. (all T2 types?) And maybe a really rare RRT2 maybe 1%?


"Back in the garage with my bullshit detector
Carbon monoxide making sure it's effective...
----THE CLASH-----

Re: RR.T2 introduction [Re: BritTwit] #711232
10/11/17 8:20 pm
10/11/17 8:20 pm
Joined: Jun 2013
Posts: 222
Georgia Mountains
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goodtry Offline
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Georgia Mountains
The RGS i picked up had a RRT2 gearbox in the crate along with the original dunlop rear wheel. It was shipped to Trinidad, wonder if the twins that were UK spec might have had this type tranny from the factory?

Re: RR.T2 introduction [Re: goodtry] #711240
10/11/17 8:49 pm
10/11/17 8:49 pm
Joined: Aug 2009
Posts: 934
gastonia .. NC
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limeyrider Offline
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gastonia .. NC
As far as my memory serves .... the RGS were fitted with RRT2 boxes as std. from the factory.

Re: RR.T2 introduction [Re: BritTwit] #711241
10/11/17 8:52 pm
10/11/17 8:52 pm
Joined: Feb 2011
Posts: 3,391
Orygone
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I've said this before, but a BSA dealer in Portland that was in business from prewar to 1974 said he never sold a Clubman GS out of his shop. That is one with clip-ons, and rearsets, and several years in the '50's they sold more Gold Stars for Hap Alzina then any other dealer on the West coast.


Bill B...


Boomer
Re: RR.T2 introduction [Re: BritTwit] #711259
10/11/17 11:50 pm
10/11/17 11:50 pm
Joined: Aug 2001
Posts: 1,864
Elko, Nevada USA
dave - NV Online content
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Elko, Nevada USA
'Back in the day', I'd had not seen a 'Uk style Clubman' with clip ons, rear sets etc. Means little. The western US GS Clubman's had conventional bars and pegs. My first '59 Goldie was a Catalina, that was soon modified with a GP, comp mag, alloy tank, etc. for play on the TT scrambles tracks that were everywhere in the US, ridden in some pro 1/2 miles. It was slowly modified with many other 'goodies' and in later years was converted to a modified road bike with SRM et ignition, Alton alternator, clips, DAY gear set, etc. It's been a joy to ride. Kinda fast as I'm told by other GS riders who 'couldn't keep up' here in the western US and England. It sets quietly waiting for some more fun. Sadly 3 of my GSr riding friends in NoCA are now 'boxed up'. sheeze. Had I mentioned flying to England and the IOM Manx with my GSr friends with the bikes? My photo shows me and that GS on the IOM beach. Ooohh fun times!

Last edited by dave - NV; 10/11/17 11:58 pm.

dave - NV
Re: RR.T2 introduction [Re: BritTwit] #711262
10/12/17 12:14 am
10/12/17 12:14 am
Joined: Aug 2001
Posts: 1,864
Elko, Nevada USA
dave - NV Online content
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Elko, Nevada USA
Speaking of GS trannies .. As I've mentioned before, the DAY gears work great vs the STD or for sure the SCT gear sets with the large gaps between the gears, between 2nd and 3rd with the STD and 3rd to 4th with the SCT. It escapes me why BSA didn't supply the DAY 'semi close' gear set as standard in all road GSs. But then they did a lot of strange unexplained things back then. Those wide ratio ART 'trials' gear boxes are silly. Obviously BSA was empting their parts bins. sheeze.
The RRT2 gearset has such close gear spacing to make it nearly unusable/practical on the road. BTW, the RRT2 1st gear ratio is nearly the same as the STD 2nd gear. Try slipping the clutch with a STD in 2nd to get underway. aargh.

Last edited by dave - NV; 10/12/17 12:22 am.

dave - NV
Re: RR.T2 introduction [Re: BritTwit] #711405
10/13/17 8:21 am
10/13/17 8:21 am
Joined: Sep 2015
Posts: 290
Kent, England
J
John Alexander Online content
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Joined: Sep 2015
Posts: 290
Kent, England
If not worried about top speed, gear down to a 20t engine sprocket if you have a 46t rear wheel or an 18t engine if you have a 42t rear wheel, this gives approx 102 MPH in top gear. No problem town riding with the RRT
Goldie John.


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