Upcoming Events

Oct
30
Sun
all-day Cogenhoe Swap Meet & AGM Cogenho... @ Cogehoe & Whiston Village Hall
Cogenhoe Swap Meet & AGM Cogenho... @ Cogehoe & Whiston Village Hall
Oct 30 all-day
Swap Meet bring and buy Triple parts followed by AGM 8:30 AM Swap Meet doors open 12:00 PM Lunch 13:00 PM Onwards TR3OC AGM Members only
Mar
24
Fri
all-day MAD MARCH RALLY 2023
MAD MARCH RALLY 2023
Mar 24 – Mar 26 all-day
Rates  for 2023 would be £61.50 pp sharing a twin/double and £86.50 for a  single room. Pet supplement of £15 per night applicable for those rooms who bring pets. THIS IS FOR DINNER BED AND[...]
Jun
30
Fri
all-day North Wales Camping Weekend @ Station Campsite
North Wales Camping Weekend @ Station Campsite
Jun 30 – Jul 2 all-day
Station Campsite tel: 01490 430237 4th North Wales Rally 30th June – 2nd July Station Campsite, Carrog LL21 9BD. Great Triples, great roads, great people. 100 mile ride out on Saturday. Bbq and live entertainment[...]

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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