| Frame numbering |
Prefix J5- |
| |
|
| Engine |
Villiers Mk 13D. Capacity 125cc.
50mm x 62mm |
| Gears |
Three speed. |
| Frame |
Single downtube with plunger rear. |
| Forks |
Light weight telescopic fork. Plastic
gaiters. (These were also available as a retro-fit for earlier girder
fork Comets and 98cc Commodore.) |
| Tyres |
2.75" x 19" |
| Tyre pressures |
Front 15 lbs.psi. Rear 22lb. psi. |
| Wheel rims |
Dunlop WMO 36 hole. Silver painted
(Argenized) |
| 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 Single lever. |
| Jet size |
Main jet 0.083" |
| 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 to oil level
mark on dipstick. The correct level of oil is then assured. Check it regularly. Castrol
"D" SAE 140 |
| Chaincase capacity |
¼ pint. Fill to oil level plug. |
| Chains |
Primary chain: 64 pitches. ⅜ x ¼ x
0.225". Renold 110038.
Final drive chain: 117 pitches (1953). 116 pitches (1954) ½" x 0.335" x 0.205"
wide (Renold 110044).
Tension movement max. ⅜" - ½" vertical |
| Sprockets |
Engine: (crankshaft) 18 teeth ⅜" pitch.
Gearbox (final drive) 17 teeth ½" pitch
Rear wheel sprocket: 44 teeth as standard. |
| Brakes |
1953 - 4" front & rear.
1954 - 4" front & 5" rear. |
| Bulbs: Direct |
Main bulb: 6v - 30 / 30w S.B.C.
Tail lamp: 6v - 3w S.B.C.
Parking lamp bulb: 3.5v - 0.15amp M.E.S.
Parking lamp battery Ever Ready No. 1289.
Speedo bulb: 6v - 0.17amp M.B.C. |
| Bulbs: Rectified |
Main bulb: 6v - 24 / 24w. Pre-focussed.
Tail lamp: 6v - 3w
Tail / Stop-light (if fitted): 6v - 18 / 3w B.C.
Parking lamp bulb: 6v - 3w M.B.C.
Parking lamp battery Ever Ready No. 1289.
Speedo bulb: 6v - 0.17amp B.C. |
| Battery |
Lucas type - PUZ7E-9. 6 volt.
12 amp-hours. |
