Upcoming Events

Oct
11
Fri
all-day Skegfest 11th -14th October 2019 @ Richmond Holiday Centre
Skegfest 11th -14th October 2019 @ Richmond Holiday Centre
Oct 11 – Oct 14 all-day
Received this from Paul Golding of South Lincs Branch of the TOMCC, anyone up for it? FAO TR3OC – . The last two years have been blessed with good attendance and great weather, 2019 see’s a[...]
Nov
2
Sat
12:00 pm TR3OC AGM 2019 Saturday 2nd Nove... @ National Motorcycle Museum
TR3OC AGM 2019 Saturday 2nd Nove... @ National Motorcycle Museum
Nov 2 @ 12:00 pm – 5:00 pm
The club AGM will take place on Saturday 2nd November 2019 at 12 midday prompt. The location is the Crows Nest Suite at the National Motorcycle Museum, Coventry Road, Bickenhill, Solihull, West Midlands Sat Nav[...]
Jun
5
Fri
all-day 2nd North Wales Rally @ Station Campsite
2nd North Wales Rally @ Station Campsite
Jun 5 – Jun 7 all-day
2nd North Wales Rally @ Station Campsite
Following the very successful event in 2019, the North Wales group of TR3OC are pleased to announce the 2nd North Wales Rally. The dates are now confirmed as the 5th, 6th & 7th of June.[...]

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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