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Oversize parts
The following are the only " oversize " variations provided for the 350 and 500 c.c. Single Cylinder machines.
Big-end rollers :
·001 in. oversize
Cylinder re-bore :
·020 in. and ·040 in. oversize
Pistons and rings :
·020 in. and ·040 in. oversize
Pistons (standard size)
Model
Top of skirt diameter
350
...
...
500
...
...
All above measurements are subject to a toleration limit of + or — ·0005 in.
Piston rings
Piston ring gap—Normal
Permissible maximum
Piston ring clearance in groove
Sparking Plug
Model
Make
...
...
All
K.L.G.
Valve timing
All timing gears are marked for ease of setting.
W i t h 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.
Weight
Weight of machine with empty tanks
Model
350
...
...
...
500
...
...
...
Wheels (bearing end play)
...
Bearing end play
2·7176 in.
3·2490 in.
...
...
...
...
...
...
...
...
...
Type
FE80
(See Illustration 10)
Standard
Rigid frame
Spring frame
344 lbs.
353 lbs.
...
...
·002 in. (just a perceptible rim rock).
Front to rear clearance
·001 in.
·001 in.
...
...
...
...
...
...
...
...
...
...
...
...
Thread
Reach
¾ in.
14 m m .
Left hand thread
Part number 000221.
Competition
Rigid frame
375 lbs.
300 lbs.
303 lbs.
386 lbs.
6
Part number
013504
013505
·006 in.
...
...
...
...
·030 in.
...
...
·002 in.
Point gap
·020 to ·022 in.
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