| Frame numbering |
1952 Prefix M (as far as I
know.) |
| |
|
| Engine |
Villiers Mk 6E. Capacity 197cc.
59mm x 72mm |
| Gears |
Three speed |
| Frame |
Single downtube with brazed up rigid rear. |
| Forks |
Early models had Model 5 forks with load
and rebound taken by three-rate springs. Later models had Model 6D
(for damper)
telescopic fork with two-rate springs with progressive oil damping on
compression and rebound. |
| Tyres |
Front: 21" x 2.75"
Rear: 19" x 3.25".
Dunlop Trials Universal tyres were fitted. A security bolt was
fitted to each wheel. The catalogue says the rims were silver
painted ("Argenized") |
| Ignition timing |
5/32"" before top dead centre. |
| Points gap |
0.012" - 0.015" |
| Plug gap |
0.018" |
| Plug type |
Original spec. Lodge HH 14.
14mm short reach. |
| Carburettor |
Villiers Type 4 / 5 two lever. |
| Jet size |
0.081" |
| Needle |
No. 4½ - variable. |
| Needle setting |
Variable - adjusted from handlebar to
suit running conditions |
| 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 level plug. |
| Chains |
Primary chain: 50 pitches. ½"
x 0.335" x 0.205" (Renold 110044)
Final drive chain: ½" x 0.335" x 0.205" wide.
(Renold 110044) |
| Sprockets |
Engine: (crankshaft) 19 teeth. ½" pitch.
Gearbox (final drive) 15 teeth. ½" pitch
Rear wheel sprocket: 52 teeth as standard. |
| Brakes |
5" front & rear |
