TM
9-879
3-4
Section II
DESCRIPTION AND
TABULATED DATA
Paragraph
Description 3
Data
4
3. DESCRIPTION (figs.
I,
2. and
3).
a.
This 2-cylinder solo
inotorcycle
is powered by a V-type,
air-
cooled
gasoline
engine,
operating on conventional 4-stroke, 4-cycle
principles.
Air-cooled
engines rely upon movement of air
over cylinder
and head
radiating
ftns, and upon
circulation
of
oil for dissipation
of
excessive
heat. Motorcycle engines, therefore, under no
conditions
should be
operated
for
more than 1 minute
when motorcycle is not
in
motion.
4.
DATA.
a.
Vehicle Specifications.
Type of engine 2-cyiinder, V-type L-head, air-cooled
Cylinder bore
23/^
in.
Stroke
3^%q
in.
Engine number (serial) left side engine
base,
below front cylinder.
Wheelbase
4 ft U14 in.
Length over-all . 7
ft 4 in.
Width
over-all
(handle bars)
3 ft 5
in.
Wheel size
18 in.
Tire
size
4.00 x 18 in.
Tire type Drop center
Weight of vehicle
(without
rider or
armament) 540 lb
Ground clearance
(skid plate)
4
in.
Kind and grade of
fuel Gasoline: 72
octane or
higher
High gear ratio
4.59:1
Engine
sprocket
31-tooth
Countershaft
sprocket
l7-tooth
Rear wheel sprocket 41
-tooth
b.
Performance.
Maximum
allowable speed
65 mph
Miles
per gallon
(hard surface) 35
7
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