Upcoming Events

Jan
6
Sat
9:00 am Newark – CAROLE NASH CLASSIC BIK... @ Newark Showground
Newark – CAROLE NASH CLASSIC BIK... @ Newark Showground
Jan 6 @ 9:00 am – Jan 7 @ 5:00 pm
A kick-start to the new classic motorcycling year, the Carole Nash Classic Bike Guide Winter Classic returns to offer enthusiasts a chance to stock up ahead of a new riding season. Hundreds of trade stands[...]
Feb
3
Sat
10:00 am 38th Carole Nash Bristol Classic... @ Bath &West Showground
38th Carole Nash Bristol Classic... @ Bath &West Showground
Feb 3 @ 10:00 am – Feb 4 @ 5:00 pm
The Royal Bath & West in Shepton Mallet, Somerset, is the venue for the traditional Carole Nash Bristol Classic MotorCycle Show – an event that many deem as their favourite of the year. With a friendly atmosphere,[...]
Feb
25
Sun
9:00 am Cogenhoe Swap Meet @ Cogenhoe Village Hall
Cogenhoe Swap Meet @ Cogenhoe Village Hall
Feb 25 @ 9:00 am – 1:00 pm
The annual TR3OC swap meet where you can buy and sell triple parts.

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BSA Rocket 3

BSA Rocket 3 (A75)

The bike was originally to be called the BSA A75 Tri Star but this was subsequently changed to Rocket 3.  The Rocket 3 is in most respects the same as the Triumph Trident T150.  It differs in having cylinders inclined at fifteen degrees from the vertical and the use of a twin down tube frame.  As with the Triumph variant, Ogle styling was adopted.

1969-bsa-rocket3

1969 BSA Rocket 3

Engine

OHV air cooled transverse 3 cylinder

Bore and stroke 67 x 70mm

Capacity 741cc

Compression ratio 9.5:1

Claimed output 58bhp @ 7250rpm

Carburation 3 x Amal 27mm concentric

Raygun silencers

Transmission

Endless triplex chain primary drive

Borg & Beck single plate dry clutch

Four speed constant mesh gearbox

Frame

Duplex cradle, all welded tubular

Suspension

Triumph type telescopic front forks

Girling rear shock absorber struts

Wheels and Tyres

Front rim WM2 x 19”

Rear rim WM3 x 19”

Front tyre 3.25 x 19” Dunlop K70

Rear tyre 4.10 x 19” Dunlop K81

Brakes

Front 8” dia. Twin leading shoe drum

Rear 7” single leading shoe drum

Tank capacities

Fuel 4.25 gallons

Oil 5 pints

Electrical

12V 8Ah battery

Lucas 120W alternator

Lucas rectifier and zener diode regulator

Dry weight

470lb

Colour Schemes

Black frame, Flamboyant Red or Flamboyant Blue

 

1970 changes

4.10 x 19” Dunlop TT100 front tyre

Revised gearbox ratio – 3rd gear lowered slightly

1971 changes

Optional 5-speed gearbox

Conical hub front and rear brakes

No front fork gaiters, Girling exposed spring rear units

Direction indicators

Colour scheme, Flamboyant Red/Flamboyant Blue/Firecracker Red. Frame Dove Grey

1972 changes

5-speed gearbox is fitted to some BSA A75

Colour scheme, black frame, Burgundy