Causes Of Defects And Their Removal - JAWA 210 Service Manual

VI. CAUSES OF DEFECTS AND THEIR REMOVAL
A. ENGINE
Engine will not start
1. Shut fuel cock.
2. Empty fuel tank.
3. Choked fuel hose, strainer or fuel jet. Water
in float chamber.
4. Faulty ignition -- carbon deposits on spark
plug electrodes, defective spark plug insulator,
excessive plug point gap, defective thyristor device
defective ignition coil or stator carrier.
5. Over flooded engine.
Remedy: Shut off the fuel cock and work the
pedals with the machine on its stand or pedal along
till the engine fires. Use the decompressor if the
moped is fitted with it. Then open the fuel cock.
It may also be necessary to unscrew the spark
plug and clean it and to turn the engine several
times to expel excessive fuel through the spark
plug hole. Reinstall the spark plug and repeat the
starting procedure.
6. Slipping or defective starting clutch. This you
can ascertain by removing the crankcase cover on
the ignition side when you will be able to see
whether the crankshaft with the rotor is rotating.
Engine runs erratically
1. Overheated engine,
2- Faulty spark plug,
3. Partly obstructed fuel supply or choked main jet
4. Leaky crankcase.
5. Faulty cable terminal.
6. Faulty ignition.
7. Imperfectly vented fuel tank.
Loss of power
1. Clogged air cleaner.
2. Clogged exhaust silencer.
3. Damaged crankcase sealing ring.
4. Damaged piston, cylinder or piston rings.
5. Leaky cylinder head.
6. Maladjusted ignition advance.
Engine power is satisfactory, but acceleration is
poor or peak speed cannot be attained.
1. Brake shoes are fouling the drums.
2. Under inflated tyres.
3. Slipping starting clutch or 2
B. TRANSMISSION
This chapter deals with the less frequent defects
which can occur in operation.
As regards identification of causes of incorrect
nd
function of 2 -speed engaging mechanisms,
it is assumed that a rider of the specified weight
rides on the moped with correctly inflated tyres on
a level road in calm weather and that the moped
has no contributory rolling resistance as, for in-
stance, maladjusted brakes, and that the secondary
transmission mechanisms have not been interfered
with, e.g. by exchanging the original sprocket for
another one with a different number of teeth.
ZVL model 210 Workshop Manual Page 25
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nd
-speed clutch
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