JAWA 50 Specification And Operator's Manual - page 17
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IV. JAWA 50, MODEL 21, SPORTS
The JAWA 50 Ultra-Lightweight, model 21
Sports, is derived from, the JAWA 20 standard
model.
A typical feature are the wide handlebars with
crossbar and quick-action throttle twist grip. It
possesses no enclosure or footboards. Motor cycle
type footrests are employed instead.
The JAWA 21 Sports is available with standard
tyres size 2.75 x 16in. For trials purposes,
the
owner can replace the rear tyre with the
S9 trials
rear tyre size 2.75 x 16in., available
as a spare part.
This sports model is intended above all for
young
riders and for competing in sporting
events.
Technical data, servicing, maintenance and
lubrication are identical with the description in
the
Owner's Handbook for the JAWA 20 Standard
model.
Spare parts are identical with those for the
JAWA
20 model. Minor differences are shown
in the
Spare Parts List.
V. JAWA 50, TYPES 23 AND 23A, MUSTANG
The light motorcycle Jawa 50 types 23 and
23A
Mustang is the continuation of the motorcycles
Jawa 50 types 20 and 21. The technical
parameters, service and maintenance are
essentially the same as with types 20 and 21. The
engine is the same for all types except the
version
of alternator (magneto) of type 23. The
type 23 has
the alternator of 30 W output (for
headlight 25/25
W and rear light 5 W), type 23
has the alternator as
the types 20 and 21 having
the 20 W output (for
headlight 15/15 W and
rear light 5W).
The wiring diagram of electric equipment of
both
types is in fig. 39. The numbering of electric
equipment is identical as with type 20. The
fuel
tank is placed behind the handlebars and
has the
capacity of 10 litres. The tool box is
beneath the
seat. The motorcycle has the minimum cowling
and it is provided with foot rest.
Headlight adjustment: The headlight is adjusted
vertically by loosening two screws on the
headlight sides and by rotating the headlight
up- or
downward as required. The headlight is
adjusted
sideways by means of two set-screws
being found
on the sides of headlight glass carrier.
Should the
headlight be rotated to the right
the R.H. screw is
to be rotated, in the opposite
case the left one.
For the gearbox is used SAE 80 gear oil. The
change of same is made after first 500 and 2,500
km, then according to the quality of oil every
10,000 to 20,000 km, by latest, however, after
3years. For the engine (for fuel) is used SAE
30 oil
while running-in in ratio 1:20, after
running-in
1:30.
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JAWA 50 type 20, 21, 23, 23A Owners Handbook page 58 to 61
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