| Frame numbering |
1946 / 47 / 48. Prefix J |
| |
|
| Engine |
Villiers Junior De Luxe. Capacity 98cc.
50mm x 50mm |
| Gears |
Single speed with clutch. Handlebar lever
has "trigger" to hold clutch out. |
| Frame |
Single downtube with rigid rear. |
| Forks |
Taper tube girder type. Single, central
undamped spring. (Early models may have had bicycle type front forks
with no springing.) |
| Tyres |
Dunlop Carrier oversize 26" x 2" |
| Tyre pressures |
Front 20 lbs.psi. Rear 28lb. psi. |
| Wheel rims |
Dunlop WMO 36 hole. Silver painted
(Argenized) |
| Ignition timing |
¼" before top dead centre. |
| Points gap |
0.015" |
| Plug gap |
0.018" - 0.025" |
| Plug type |
Original spec. Lodge CB 3 |
| Carburettor |
Villiers "Junior" Type |
| Jet size |
J7 |
| Needle |
No. 2 |
| Needle setting |
29 / 32" from tip of needle
to bottom of slide |
| Tank capacity |
11 pints approximately. Use of unleaded
fuel will cause no problems |
| Petroil mixture |
16:1 as originally specified. Can be
safely reduced to 24:1 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 |
Not applicable as the primary chain runs
within the gearbox. |
| Chains |
Primary chain: 54 pitches
Final drive chain: ½" x 0.305" x 0.192" wide (Coventry 112045).
Tension movement max. ⅜" vertical |
| Sprockets |
Engine: (crankshaft) Villiers Pt. No.
E4931 ⅜" pitch.
Gearbox (final drive) 10 teeth ½" pitch (Villiers part number D 4947) |
| Brakes |
4" front & rear |
| Bulbs |
Main bulb: 6v - 1amp 19mm S.B.C.
Tail lamp & Parking lamp bulb: 4v - 0.3 amp M.E.S.
Parking lamp battery Ever Ready No. 1289 ( I wonder if they still make
them ?) |
