| Frame numbering |
1962 Prefix EM25 - xxx. 1963 Prefix
FM25 - xxx. |
| |
|
| Engine |
Villiers 2T. Capacity 250cc.
50mm x 63.5mm |
| Gears |
Four speed |
| Frame |
Composite frame with front top & down
tube, fabricated central section and pressed rear mudguard. |
| Forks |
Telescopic. 1962 - Mk.1. 1963
- Mk2. |
| Tyres |
3.25" x 18" |
| Tyre pressures |
|
| Wheel rims |
Dunlop WM2 36 hole |
| Ignition timing |
3/16" before top dead centre. |
| Points gap |
0/012" - 0.015" |
| Plug gap |
0.018" - 0.025" |
| Plug type |
Original spec. Lodge HH 14 |
| Carburettor |
Villiers S22 / 2 |
| Jet size |
170cc, 180cc or 190cc |
| Needle |
No.3½ |
| Throttle |
No. 3 cutaway |
| Pilot jet |
35cc |
| Tank capacity |
2¾ gallons approximately. 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 |
The gearbox has a dipstick.
The correct level of oil is then assured. Check it regularly. Castrol
"XL" SAE 30 |
| Chaincase capacity |
Fill to level plug. Castrolite SAE
20 |
| Chains |
Primary chain: 60 pitches.
(Renold 110038)
Final drive chain: ½" x 0.335" x 0.305" wide. 20
teeth (Depends on final gearing). |
| Sprockets |
Engine: (crankshaft) 20 teeth ( I think)
x ⅜" pitch.
Gearbox (final drive) ½" pitch. No. of teeth depends on gearing. |
| Brakes |
6" front & rear |
Bulbs
Taken from Villiers parts list. |
Main bulb: 6v - 30 / 24w pre focus
Tail lamp: 6v - 3w
Stop light bulb: 6v - 18w
Parking lamp bulb: 6v - 3w
Speedo: 6v - 1.8w |
