Www.jawamoped.com - JAWA 210 Service Manual

Defect
Engine will not start
Faultless freewheel in rear wheel
Engine starts but starting is difficult
Engine starts only when pushing
down the pedal energetically
Rear wheel rotates at idling speed
with moped propped on stand
Slipping starting clutch
Engine starts and runs, starting clutch
in good working condition but
moped does not start moving in first
gear or moves for only a brief period
and then force closing is interrupted.
Sometimes force closing is restored
when decreasing engine speed.
When starting off at full throttle on
level road, engine overspeeds in first
gear. This may not necessarily be
considered a defect.
When starting off at full throttle on
level road, the engine fails to attain
the required speed in first gear and
nd
soon changes to the 2 gear.
This is normal when riding downhill
because of decreased
resistance.
st nd
Changing from 1 to 2
longer than normal.
nd
Slipping 2 speed clutch
1. Oil on drum friction surface.
2. Water on drum friction surface.
3. Regulating
clamped between parts does not move
and does not expand 2
4. Worn lining of second speed shoes.
Regulating driver strikes against shoe
pivot during starting and does not
force shoes
surface.
nd
2 speed clutch faultless, indented belt
rotates, starting clutch slips.
1. Oil or water on lining.
2. Worn or torn off lining, broken shoe.
Resistance
assembly)
1. Excessive preload of starting shoe
springs.
2. Starting shoes move with difficulty.
nd
3. 2 speed clutch shoes foul the shoe
driver.
1. Too high idling speed.
2. GUFERO sealing ring not fully
pressed home in small pulley.
3. Starting shoes do not retract fully.
4. Starting shoes driven mostly when
starting clutch is warmed up. Probably
interchanged shoes.
Worn friction lining.
1. Freewheel in engine does not engage
firmly.
2. Damaged – worn face for freewheel
rollers.
nd
1. 2 speed shoes move sluggishly.
2. Increased frictional resistance between
regulating driver and shoe brass layer.
3. Engine has an output surpassing the
recommended output or a different
torque characteristic.
1. Insufficient engine power, moped
often cannot attain its specified peak
speed.
rolling
gear takes 1. First to forth gear changes takes
longer because of cold clutch which
has not yet attained its normal service
temperature.
2. Oil or grease on regulating driver and
shoe contact areas. Light vibration
might occur in final stages of 2
engagement.
Cause
driver (driving dog)
nd
Speed shoes.
against drum inner
in pedal system (central
nd
gear
ZVL model 210 Workshop Manual Page 26 & 27

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Removal
1. Degrease drum surface and lining.
2. Wipe dry drum surface and lining.
3. Work free or renew driver. Possible
defect of M10 x 1.25 nut, eg.
Obliquely cut thread.
nd
4. Renew 2 speed shoes
1. Degrease or wipe dry.
2. Renew starting shoe.
Lubricate pedal cranks and shaft, & adjust
correct tension of chain if it is too taut.
1. Renew or expand springs.
2. Work them free.
nd
3. Work free 2 speed shoes.
1. Decrease idling speed.
2. Press sealing ring home ( flush with
pulley.
3. Check chamfering of leaf spring edges
4. Install shoes in their correct place.
Renew shoes.
1. Change oil in transmission. Use oil of
lower viscosity in frosty weather.
2. Renew freewheel gear.
1. Work them free.
2. Burnish hard chrome plated lands on
regulating driver, or renew the driver.
Never lubricate contact areas as
friction damps vibration of 2
shoes in final gear change state.
3. Not considered as defect as long as
moped peak speed is observed.
Accelerate with only partly open throttle.
1. Proceed as per section "Loss of
power"
1. Not regarded as defect.
2. Degrease
nd
speed
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