Frame

Numbered 46501 to 49600 (approx). Bolt on seat stays with cam type chainstays for rear wheel adjustment.

Wheels

WM2x19 (f), WM2x19 (r). Rear, interchangeable with chrome rims. Black spokes with NPB nipples. Bolt on rear sprocket.

Mudguards

Inverted 5 1/2” U section, valanced front with bottom splash guard. Rear, unvalanced blade, with hinged tail section and vertical valence fitted on the front LHS.

Tanks

Petrol tank chrome plated with lined black panels. Single offset CEE-ESS type filler with front fitted petrol balance pipe. Single bolt damper arm fixing. Brass lever petrol tap.

Engine

Numbered 4901 to 7400 (approx) - 4 valve 499cc with cast iron open valve cylinder head, parallel inlet valves and parallel exhaust with rockers mounted on cast pillars. Carburetter flange proud of cylinder head finning.18mm side plug. Oil feed to rear of cylinder. Rear mounted round ML magneto type CMAK and forward mounted Miller DM3G dynamo. Plain cast alloy rocker cover.

Brakes

8” front and rear, coupled with steel shoes.

Electrics (optional)

Miller 7” headlamp with No 832 8-0-8 'Lighthouse' ammeter and 29E rear lamp.

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 6/141 long body with Amal straight pull twist grip control. Original settings: main jet 150, slide 6/4, needle jet 106, needle position 2. Chrome plated copper fuel pipe.

Exhaust system

Twin 1 3/4” low-level downpipes into Rudge ‘can’ type silencers and 6” fishtails.

Standard Fittings

Pressed steel stand with lifting handle, stop light, 1” handlebars with Amal ‘clean’ type levers. Single toolbox fitted to offside of machine. Steering damper and hand operated fork shock absorber. Open ended ‘D’ section forks.

Extras

Black & gold petrol tank finish, chrome plated petrol tank with maroon panels with black guards. Black with maroon guards & tank panels. Smith’s trip/non trip speedometer, Smith’s 2" 8 day clock in damper arm, Bonniksen speedometer, legshields, pillion footrests, electric horn, Lucas No 63 bulb horn, competition exhaust pipes, footchange and carrier (at no extra charge).

©  Colin Chapple