Chain Sizes
Front chain
Rear chain
Gear Ratios
Internal Ratios
Top
Third
Second
First
Actual Ratios
Top
Third
Second
First
Sprocket Sizes
Engine
Clutch
Final drive
Rear wheel
a" x .225" (73 links)
½" x
.305"
(125 links)
1 to 1
1.30 to 1
1.85 to 1
2.92 to 1
6.89 to 1
8.96 to 1
12.75 to 1
20.12 to 1
21 teeth
50 teeth
19 teeth
55 teeth
350 c.c. Lightweight Model
identity
Engine number
Frame number
Cylinder bore
Stroke
Cubic capacity
Carburettor
Type 389/42
Main jet (without air filter)
Main jet (with air filter)
Choke size
Throttle slide
Needle position
Capacities
Petrol tank
Oil capacity
Gear box
Front chain case
Compression Ratio
General
Seat height
Wheelbase
Weight
Ground clearance
Cylinder bore
Nominal size
On the crankcase near engine
plate cowling.
On right hand side of frame head
lug.
72 mm.
85.5 mm.
347 c.c. (21.17 cu. ins.)
Amal Monobloc (12° inclination)
220
220
18"
3½
central (.106) pilot 25
3¼ gallons (12.5 litres)
2½ pints (1.4 litres)
3 pints (1.8 litres)
568 c.c.
6.9 to 1
29.5" (74 cms.)
53" (134.5 cms.)
340 lbs. (154 kilos)
6" (15 cms.)
2.8345 + .0005" – .0005"
7
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