Upcoming Events

Jun
25
Fri
all-day Scottish Borders Weekend @ Glentress Hotel
Scottish Borders Weekend @ Glentress Hotel
Jun 25 – Jun 27 all-day
Scottish Borders Weekend @ Glentress Hotel
The 4th (almost) Annual TR3OC Scottish Borders Weekend Friday 25th to Sunday 27th June 2021 The North of the Borders Section (NOBS) and the Tyne, Wear and Tees Section (TWATS) invite you to join us[...]
Jul
4
Sun
all-day CANCELLED! Kirkcaldy Motorcycle ... @ Ice Arena
CANCELLED! Kirkcaldy Motorcycle ... @ Ice Arena
Jul 4 all-day
Unfortunately the Kirkcaldy Motorcycle Show has been cancelled New event for the club, held on the ice ring which is a first! Ran by the Kirkcaldy Motor Cycle Club which had in the past held[...]
Jul
9
Fri
all-day Jurassic Camping @ Woodyhyde Campsite
Jurassic Camping @ Woodyhyde Campsite
Jul 9 – Jul 10 all-day
A new event for the club. It is basically a camping weekend with ride outs and walks in a beautiful coastal area of Dorset. Corfe Castle is just over a mile away, Swanage heritage railway[...]

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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