Engine sprocket size
15 teeth
16 teeth
17 teeth
(a) 18 teeth
19 teeth
20 teeth
(b) 21 teeth
First gear
18·55 to 1
17·32 to 1
16·32 to 1
15·44 to 1
14·55 to 1
13·91 to 1
13·25 to 1
Second gear
11·90 to
1
11·15 to 1
10·47 to 1
9·90 to 1
9·33 to 1
8·91 to 1
8·50 to 1
Third gear
9·15 to 1
8·58 to 1
8·05 to 1
7·63 to 1
7·18 to
1
6·86 to 1
6·54 to 1
Fourth gear
(top)
7 to
1
6·56 to 1
6·16 to
1
5·83 to 1
5·49 to 1
5·25 to 1
5·0 to 1
Gear ratios, Touring Models
(a) Standard for 350 c.c Touring Models (b) Standard for 500 c.c. Touring Models.
Gear ratios, Trials Model
Engine sprocket size
15 teeth
16 teeth Standard
17 teeth
18 teeth
19 teeth
20 teeth
21 teeth
First gear
22·4 to 1
21·0 to
1
19·7 to
1
18·68 to 1
17·57 to 1
16·8 to
1
16·0 to
1
Second gear
17·25 to 1
15·98 to 1
15·0 to 1
14·2 to 1
13·38 to 1
12·8 to
1
12·18 to
1
Third gear
11·03 to
1
10·33 to 1
9·7 to
1
9·2 to
1
8·65 to 1
8·37 to 1
7·81 to 1
Fourth gear
(top)
7 to
1
6·56 to 1
6·16 to 1
5·83 to 1
5·49 to 1
5·25 to 1
5·0 to 1
Lighting (bulbs)
Location
Head lamp (Pre-focus)
Pilot lamps
Rear lamp
Speedometer
Type
Double filament
Single contact
Double filament
Single contact
Voltage
6
6
6
6
Wattage
30X24
3
18 & 3
1·8
Part
number
312
988
352
53205
Oversize parts
The following are the only " oversize " variations provided for the 350 and 500 c.c. Single Cylinder machines
Big-end rollers : Cylinder re-bore : Pistons and rings :
ezisrevo .ni 040· dna .ni 020· ezisrevo .ni 040· dna .ni 020· ezisrevo .ni 100·
Pistons (standard Size)
All measurements are subject to a toleration limit of + or — ·0005 in.
Model
350
500
Top of skirt diameter
2·7176 in.
3·2490 in.
Front to rear clearance
·001 in.
·001 in.
Part number
013504
013505
Piston ring gap
Normal
Permissible maximum
Piston ring clearance in groove
·006 in.
·030 in.
·002 in.
Sparking Plug
Model
All
Make
K.L.G.
Type
FE80
Thread
14
mm.
Reach
¾
in.
Point gap
·020 to ·022 in.
Valve timing (See Illustration 10)
All timing gears are marked for ease of setting. W ith Marks coinciding correct timing is assured.
Valve Guide Projection (Top of Guide to Boss)
inlet—½" Exhaust—½"
Valve timing pinion
Retained by nut, threaded v in. by 26 threads per in. Left hand thread. Part number 000221.
C—S
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