BSA Gold Star

                   Five speed close ratio gearbox

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Designed to fit into the BSA pre unit gearbox shell, either standard with layshaft support bushes or RRT2 type using needle rollers.  It is possible to convert the standard case to use needle bearings by replacing the standard layshaft bushes.  Instructions can be found by clicking here.

It comprises of all the internal components for conversion to a five speed gearbox, the only original parts retained are the selector shaft and the selector pawl mechanism which connects directly to the gear lever.

The RRT2 speedo drive and standard kick start ratchet gear are retained, so that the gearbox may be used for both road and racing use.

 

NOTE: BSA 5 SPEED ROAD/TOURING GEARBOX NOW AVAILABLE: CLICK HERE

 

We offer two different camplates to give either shift pattern. 

Our standard camplate gives 1 Down, 4 Up with a forward facing lever and standard footpeg position. This is sent as standard.

Our reverse camplate gives 1 Up, 4 Down with a forward facing lever and standard footpeg position. Please specify if you require this one when ordering.

If you have a different arrangement with rearsets and a different lever position please ensure you specify which camplate you require.

 

Click here for BSA Goldstar fitting guide

 

Click here for guide to convert standard shell to run needle bearings - this is optional.

 

Available With Superfinish

 

Ratio's as follows:

BSA 5 speed                                                                     BSA RRT2

1st        17 - 26   X  DR  =  2.124:1                                 1st    1.754:1 
                                                               )    24.8%                                          )      24.4%
2nd       20 - 23   X  DR  =  1.600:1                                2nd   1.326:1
                                                               )    20.0%                                          )      17.1%
3rd        25 - 23   X  DR  =  1.280:1                                 3rd   1.099:1 
                                                               )    14.0%                                          )        9.0%
4th        24 - 19   X  DR  =   1.100:1                                4th    1.000:1 
                                                               )      9.0%     
5th        25 - 18   X  DR  =   1.000:1  

 

Drive Ratio (DR)  18 - 25   1.389:1

Overall Reduction 1st - 5th                    53.0%             Reduction 1st - 4th  43.0%

 

To find out about availability or to order this product or for further information please click here

 

Price £1450 + VAT (if applicable) & carriage

 

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