| Frame numbering |
(1954)
K12-000101. (1955) 55K12-xxx. (1956) 56K12-xxx.
(1957) 57K12-xxx. |
| |
|
| Engine |
Villiers Mk 1H. Capacity 224cc.
63mm x 72mm |
| Gears |
Three speed |
| Frame |
Single downtube with swinging-arm rear. |
| Forks |
Telescopic. |
| Tyres |
1954 - 55 3.00" x 19".
1956 - 57 3.25" x 18" |
| Tyre pressures |
|
| Wheel rims |
Dunlop WM2 36 hole |
| Ignition timing |
" before top dead centre. |
| Points gap |
0.015" |
| Plug gap |
|
| Plug type |
|
| Carburettor |
Villiers S25 1 3/16" inlet bore |
| Jet size |
No. 120 std. |
| Needle |
No. 3½ |
| Throttle slide |
No. 3 std. |
| Tank capacity |
2¾ gallons. Use of unleaded
fuel will cause no problems |
| Petroil mixture |
20:1 as originally specified. Can be
safely reduced to 24:1 with modern oils. |
| Gearbox capacity |
Fill to dip stick mark. |
| Chaincase capacity |
Fill to drain plug level |
| Chains |
Primary chain: 60 pitches
Final drive chain: 125 pitches ½" x 0.335" x 0.305" wide. |
| Sprockets |
Engine: (crankshaft) 20 teeth. ⅜" pitch.
Gearbox (final drive) 18 teeth ½" pitch. Villiers part no. E9106.
17 teeth for sidecar. Villiers part no. E8160. |
| Brakes |
6" front & rear |
| Bulbs |
Main bulb: 6v - 24 /24w. Pre-focussed.
Tail lamp: 6v - 18 / 3w
Parking lamp bulb: 6v - 3w. |
| Battery |
Lucas type PUZ7E-9. 6 volt. 12 Amp-hour. |
