Author Topic: STB gearbox ratios  (Read 849 times)

Online spanersc

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STB gearbox ratios
« on: 09.06. 2015 22:50 »
Hi All.  My genuine Ex USA Rocket Gold Star has a gearbox that's stamped 'STB'  I understand that this was used on bikes that were originally supplied to the States, Do any of our American users have any knowledge of what the ratios are for this box? Any information much appreciated.  Regards, Peter
Peter C    Cambridgeshire. UK   1935 Blue Star. 1950 A7 Rigid.  1952 A7ST.  1953 A7ST.  1953 A10 Super Flash.  1954 A7ST.  1955 A7SS.  1955 A10.  1956 A10RR.  1962 RGS.  1962 DBD34

Offline Topdad

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Re: STB gearbox ratios
« Reply #1 on: 10.06. 2015 12:18 »
Hi Peter, go on Draganflys web site and download there parts info I'm pretty sure it shows cogs etc. I thought that RGS's originally had an RRT close ratio box  and is the stamp STD meaning standard . Some riders didn't like the higher first gear in the RRT and changed the box to standard , there are many RGS owners on the forum they'll soon get you the answer,regards bob.
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Online chaterlea25

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Re: STB gearbox ratios
« Reply #2 on: 10.06. 2015 20:29 »
Hi,
Heres the gearbox code / ratio chart

HTH
John
1961 Super Rocket
1963 RGS (ongoing)

Online spanersc

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Re: STB gearbox ratios
« Reply #3 on: 10.06. 2015 21:36 »
Hi John. Thanks for the info however there is no mention of an 'STB' stamping.  I think it was possible that the RGS's sent to Hap Alzina   had the STB set-up. Some idea of the ratios within would be nice. The chap who sold me the bike claimed it was purely a mis-stamping and should be STD for standard. Any ideas anyone?  Thanks in anticipation. Peter
Peter C    Cambridgeshire. UK   1935 Blue Star. 1950 A7 Rigid.  1952 A7ST.  1953 A7ST.  1953 A10 Super Flash.  1954 A7ST.  1955 A7SS.  1955 A10.  1956 A10RR.  1962 RGS.  1962 DBD34

Online trevinoz

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Re: STB gearbox ratios
« Reply #4 on: 10.06. 2015 22:25 »
spanners,     
                        the STB box, I think you will find, is also known as the STD2.
Good for wheel stands but not much else.
This box was fitted mostly to U.S. market Super Rockets.
The Gold Star Twin, U.S. market RGS, was usually fitted with the ARR2 box.

Offline duTch

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Re: STB gearbox ratios
« Reply #5 on: 11.06. 2015 01:57 »

 Am guessing you should get a fair idea how it feels when you ride it, but only way to know for sure is to pull it apart...reasonable thing to do with a new acquisition anyway..
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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