| Frame numbering |
1954. K7-xxx
1955. 55K7-xxx. 1956. 56K7-xxx. 1957.
57K7-xxx
1958. AK7-xxx. 1959. BK7-xxx |
| |
|
| Engine |
1954 - 57 Villiers Mk 8E. Capacity 197cc.
59mm x 72mm
1958 - 59 Villiers Mk 10E. Capacity 197cc. 59mm x 72mm |
| Gears |
Three or four speed on 8E.
Three speed only on 10E. (Owners could fit a 4 speed box to the 10E.) |
| Frame |
Single downtube with swinging-arm rear. |
| Forks & hubs |
Telescopic. Early forks were
undamped. Later forks were oil-damped.
Half-width hubs for 1954. Full-width hubs 1955 on. |
| Fork oil capacity |
1954: ¼ pint per leg . (SAE 20 ?)
1955 on: 55cc per leg. SAE 20 |
| Tyres |
1954 - 55: 3.00" x 19" front
& rear.
1956: 3.00" x 18" front
& rear.
1957 - 59: 3.00" x 18" front. 3.25" x 18" rear. |
| Wheel rims |
All years: Dunlop WM1 36 hole |
| Ignition timing |
5/32" before top dead centre. |
| Points gap |
0.012" - 0.015" |
| Plug gap |
0.018" - 0.025" |
| Plug type |
Original spec. Lodge HH14. 14mm.
Short reach. |
| Carburettor |
1954 - 55: Villiers Type S.24
1956 - 57: Villiers Type S.25
1958 - 59: Villiers Type S.25/2
|
| Throttle |
No. 3 (All years) |
| Needle |
No. 3½ (All years) |
| Needle setting |
1.95"
out. (All years) |
| 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 |
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: 66 pitches. ⅜"
x ¼" x 0.225"
Final drive chain: ½" x 0.335" x 0.205" wide.
1954 - 55. 121 links.
1956 122 links
1958 126links |
| Sprockets |
Engine: (crankshaft) 8E. 23 teeth.
10E. 20 teeth
Gearbox (final drive) 8E. 17 teeth 10E. 17 teeth |
| Brakes |
5" front & rear |
| Bulbs |
Headlamp: 6v - 24 / 24w S.B.C.
(1957 - 24 / 24w pre-focus bulb) (1958 & 59 - 30 / 24w pre-focus)
Stop & tail lamp: 6v - 18 / 3w.
Parking lamp: 6v - 3w M.B.C.
Speedo: 6v - 0.15amp M.B.C. (1959 - 6v - 5.3amp) |
