| Frame numbering |
1956 56L1-xxx. 1957
57L1-xxx. 1958 AL1-xxx 1959 BL1-xxx etc. |
| |
|
| Engine |
Villiers Mk 4F. Capacity 98cc.
47mm x 57mm. (Mk 6F optional) |
| Gears |
Two speed. Handlebar lever has "trigger".
(Mk 6F has foot change) |
| Frame |
Tubular front and top rails.
Pressed & fabricated central tub and swinging-arm. |
| Forks |
Lightweight telescopic |
| Fork oil capacity |
82.5cc per leg. SAE 20 |
| Tyres |
2.25" x 19" |
| Tyre pressures |
Front 20 lbs.psi. Rear 25lb. psi. |
| Wheel rims |
Dunlop WMO 36 hole. Silver painted
(Argenized) |
| Ignition timing |
⅛" before top dead centre. |
| Points gap |
0.015" |
| Plug gap |
0.018" - 0.025" |
| Plug type |
Original spec. Lodge H 14 short reach. |
| Carburettor |
Villiers S12. |
| Jet size |
85cc |
| Needle |
No. 2 |
| Needle setting |
Normal setting on centre notch. |
| Tank capacity |
2¼ 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 |
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: 56 pitches. ⅜"
x ¼" x 0.225"
Final drive chain: 122 pitches. ½" x 0.305" x 0.192" wide (Coventry 112045). |
| Chain tension |
Unladen: ¾" - 1" whip.
Laden: ⅜" - ½" whip |
| Sprockets |
Engine: (crankshaft) ⅜" pitch.
17 teeth
Gearbox (final drive) 14 teeth ½" pitch |
| Brakes |
4" front. 5" rear. |
| Bulbs: Direct |
Main bulb: 6v - 24 / 24w.
Pre-focussed.
Tail lamp: 6v - 3w B.C.
Speedo bulb: 6v - 0.15amp M.B.C. (if fitted)
Parking lamp bulb 3.5v - 0.15amp M.E.S.
Parking lamp battery Ever Ready No. 1289 |
