| Frame numbering |
1949: Prefix D.
1950 - 51: Prefix C.
1952: Prefix M. |
| |
|
| Engine |
Villiers Mk 10D. Capacity 122cc.
50mm x 62mm |
| Gears |
Three speed with foot change. |
| Frame |
Single downtube with rigid rear. |
| Forks |
1949 Taper tube girder type. Single, central
undamped spring.
1950 Dunlop type forks.
1951 Model 5 forks
1952 Model 5 forks for Standard & Model 6 forks for Deluxe. |
| Tyres |
1949: 3.00" x 19"
1950 on: Standard 2.50" x 19". Deluxe 3.00" x 19" |
| Tyre pressures |
Front 20 lbs.psi. Rear 25lb. psi. |
| Wheel rims |
Dunlop WM1 36 hole |
| Ignition timing |
5/32" before top dead centre. |
| Points gap |
0.015" |
| Plug gap |
0.018" - 0.025" |
| Plug type |
Original spec. Lodge H14 |
| Carburettor |
Villiers Type 3 / 4 |
| Jet size |
0.83" |
| Needle |
No. 3 |
| Needle setting |
2 13/32" from tip of needle
to bottom of slide |
| Tank capacity |
2¼ gallons approximately. Use of unleaded
fuel will cause no problems |
| Petroil mixture |
16:1 as originally specified. Can be
safely reduced to 20:1 with modern oils. |
| Gearbox capacity |
Remove oil level screw on side of engine
casing and oil filler screw on top of casing. Fill oil through the
filler opening until oil begins to run out through the level plug hole.
The correct level of oil is then assured. Check it regularly. Castrol
"D" SAE 140 |
| Chaincase capacity |
Fill to drain plug level. SAE 140 |
| Chains |
Primary chain: 64 pitches (Renold
110038)
Final drive chain: ½" x 108 links (Renold 110044) |
| Sprockets |
Engine: (crankshaft) 18 teeth ⅜" pitch.
Gearbox (final drive) 15 teeth ½" pitch |
| Brakes |
5" front & rear |
| Bulbs: Rectified |
Main bulb: 6v - 24 / 24w
Tail lamp: 6v - 3w
Stop light (where fitted): 6v - 18w
Parking lamp bulb: 6v - 3w
Parking lamp battery Ever Ready No. 1289 |
| Bulbs: Direct |
Main bulb: 6v - 30 / 30w
Tail lamp: 6v - 3w
Parking lamp bulb: 3.5v - 0.15amp
Speedo bulb: 6v - 0.17amp
Parking lamp battery Ever Ready No. 1289 |
