Frame

Numbered 49601 to 52195 (approx). Bolt on seat stays with drawback type chainstays for rear wheel adjustment.

Wheels

WM1x19 (f), WM1x19 (r) with identical hubs and chrome plated rims. Black spokes with NPB nipples.

Mudguards

Plain inverted U section 5.5” wide, unvalanced front and rear. Rear with detachable tail section. Tail section supported by wire stays.

Tanks

Petrol/oil tank Chromium plated with lined black panels. Twin Westwood  type fillers with rear fitted petrol balance pipe. Single bolt damper arm fixing. Brass lever petrol tap.

Engine

Numbered 1 to 700 (approx) - 4 valve 249cc with cast iron open valve radial cylinder head, bolted to the barrel from below. Oil feed to rear of cylinder. 18mm central plug. Lucas Maglita ignition/dynamo

Brakes

Both 6 3/4", coupled with steel shoes.

Electrics (optional)

Lucas 7” headlamp, CZ23 8-0-8 ammeter and Lucas rear lamp. (where fitted). BTH magneto without lights.

Transmission

4 speed gearbox with hand change on RHS of tank. Aluminium oil bath chaincase with no ‘R’ on dome and separate filler on shock absorber dome.

Carburetter

Amal type 5/151 with Amal straight pull control.

Exhaust system

Twin 1 1/2” low level pipes into Rudge ‘can’ type silencers and 6” fishtails.

Standard Fittings

1” adjustable handlebars with folded type clutch and inverted levers. Single toolbox mounted opposite battery carrier. Steering damper only. Open ended ‘D’ section forks. Pressed steel central stand.

Extras

Smiths 2" 8 day clock in steering damper arm, pillion footrests, leg shields, Smiths or Bonniksen speedometer, competition exhaust pipes, electric horn, Lucas No 63 bulb horn and footchange. Black & gold or chrome plated petrol tank with maroon panels with black or maroon guards. Black with maroon guards & tank panels.

©  Colin Chapple