Upcoming Events

Jul
25
Thu
all-day Beezumph 28 2019 @ Cadwell Park Race Circuit
Beezumph 28 2019 @ Cadwell Park Race Circuit
Jul 25 – Jul 26 all-day
Beezumph 28 2019 @ Cadwell Park Race Circuit | Wales | United Kingdom
The TR3OC Committee would like to announce that this years BEEZUMPH RALLY will take place at Cadwell Park on the 25th and 26th of July. Hope to see you there.
Aug
3
Sat
all-day Llangollen International Motorcy... @ Royal International Pavilion
Llangollen International Motorcy... @ Royal International Pavilion
Aug 3 – Aug 4 all-day
Llangollen International Motorcycle Festival @ Royal International Pavilion | Llangollen | United Kingdom
LLANBIKEFEST 2019 – AUGUST 3 & 4 Royal International Pavilion, Abbey Road, Llangollen LL20 8SW   LlanBikeFest is run by a group of North Wales enthusiasts who are mad about bikes of all kinds – on road,[...]
Aug
16
Fri
all-day 10th Aussie Triples Rally
10th Aussie Triples Rally
Aug 16 – Aug 18 all-day
The 10th Aussie Triples Rally will be held at Evans Head, Northern NSW for three days from Friday 16th August 2018 to Sunday 18th August 2019.   

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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