| Frame numbering |
Frame numbers were prefixed M for 1952. They may have used an S suffix
to denote "springer" They used the prefix J5 for 1953. |
| |
|
| Engine |
Villiers Mk 13D. Capacity 125cc.
50mm x 62mm |
| Gears |
Three speed. |
| Frame |
Single downtube with detachable rear
frame. Plunger rear suspension. |
| Forks |
Model 6 lightweight telescopic fork.
Undamped three-rate springs. Plastic
gaiters. |
| Tyres |
3.00" x 19" |
| Wheel rims |
Dunlop WM1 36 hole. Silver painted (Argenized) |
| Ignition timing |
5/32" before top dead centre. |
| Points gap |
0.015" |
| Plug gap |
0.018" - 0.025" |
| Carburettor |
Villiers Type 3 / 4 |
| Jet size |
Main jet 120cc |
| Needle |
No. 3 |
| Needle setting |
2 13/32" out. |
| Tank capacity |
2 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 level plug |
| Chains |
Primary: ⅜" x ¼" x 0.225". 64
pitches. Renold 110038.
Final drive: ½" x 0.335" x 0.205". 116 pitches. Renold
110044 |
| Sprockets |
Crankshaft: 18 teeth. ⅜" pitch.
Gearbox: 17 teeth. ½" pitch.
Rear Wheel sprocket: 44 teeth as standard. |
| Brakes |
5" front & rear. |
| Bulbs: Direct |
Main bulb: 6v - 24 / 24w.
Tail lamp: 6v - 3w M.B.C.
Tail & stop lamp (where fitted) 6v - 18 / 3w
Parking lamp bulb: 6v - 3w amp
Parking lamp battery Ever Ready No. 1289 |
