Upcoming Events

Jan
11
Sat
9:00 am CAROL NASH CLASSIC BIKE GUIDE WI... @ Newark Showground
CAROL NASH CLASSIC BIKE GUIDE WI... @ Newark Showground
Jan 11 @ 9:00 am – Jan 12 @ 5:00 pm
CAROL NASH CLASSIC BIKE GUIDE WINTER CLASSIC @ Newark Showground
Held in the grounds of the Newark Showground. A large covered display of classic and vintage bikes, including club stands. Also, a variety of vendors and an outdoor auto jumble with bargains to help you[...]
Feb
1
Sat
9:00 am CAROL NASH BRISTOL CLASSIC BIKE ... @ The Royal Bath & West Showground
CAROL NASH BRISTOL CLASSIC BIKE ... @ The Royal Bath & West Showground
Feb 1 @ 9:00 am – Feb 2 @ 4:00 pm
NOTE – Date change due to inclement weather What’s on Classic Bike Shows’ annual trip to the West Country is well known for the extravagant exhibitions put on by the local motorcycle clubs who go[...]
Feb
23
Sun
9:00 am Cogenhoe Swap Meet 2020 @ Cogenhoe Village Hall
Cogenhoe Swap Meet 2020 @ Cogenhoe Village Hall
Feb 23 @ 9:00 am – 1:00 pm
Cogenhoe Swap Meet 2020 @ Cogenhoe Village Hall
MEMBERS ONLY FREE EVENT This is a member’s only auto jumble where you can bring and buy Triple parts and sometimes complete bikes. Those hidden gems and hard to find parts can sometimes be found[...]

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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