| Frame numbering |
1959. BL25T-xxx. 1960.
CL25T-xxx etc. |
| |
|
| Engine |
AMC 25C. 249cc. 66mm x 73mm. |
| Gears |
Four speed. |
| Frame |
Single downtube with swinging-arm rear. |
| Forks |
Telescopic. Oil-damped. |
| Fork oil capacity |
165cc per leg. SAE 50 |
| Tyres |
Front: 21" x 2.75". Rear: 19" x
4.00" |
| Tyre pressures |
Front 12 lbs.psi. Rear 12lb. psi.
(Road use) |
| Wheel rims |
Front: Dunlop WM1 36 hole.
Rear: Dunlop WM3 36 hole |
| Ignition timing |
¼" before top dead centre. |
| Points gap |
0.018" |
| Plug gap |
0.018" - 0.020" |
| Plug type |
Original spec. Lodge 2HLN |
| Carburettor |
AMAL Type 389. 1" bore. |
| Jet size |
Main jet: 240
Needle jet: 0.105"
Pilot jet: 30 |
| Needle setting |
2nd groove from the top. |
| Tank capacity |
2¼ 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 |
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: 60 pitches. ⅜"
x ¼" x 0.225"
Final drive chain: 134 links ½" x 0.355" x 0.305" wide |
| Sprockets |
Engine: (crankshaft) 20 teeth ⅜" pitch.
Gearbox (final drive) 15 teeth ½" pitch.
Rear wheel sprocket 60 teeth. |
| Brakes |
6" front & rear |
