Trouble shooting
Localizing defects should always be done systematically.
In
case the engine will not start the cut off wire has to be
disconnected first, because it happens that this wire,
owing to damage, contacts ground.
Thereafter check whether fuel comes into the carburet-
tor, by pulling off the fuel line of the carburettor.
If there is no fuel just take off the fuel tank cap because
the desaeration may be stopped up, causing too little
pressure on the fuel in the tank.
Trouble can be located in most of the cases with the data
mentioned below:
I
Engine does not start or bad starting.
a-Short circuiting
b-no fuel
c-No or a too weak spark Check as shown in pict. 15
below.
Pict. 15
Distance between arrows must
be
3-4 mm.
(.12-.16")
d-Miscellaneous
Disconnect cut off wire from connecting block.
— Desaeration of fuel tank cap is stopped up.
— Strainer of fuel tank cap is stopped up.
— Fuel line is pinched.
— Float gets stuck caused by bended needle or the
guide in bottom of float chamber is polluted.
— Strainer of banjo bolt is stopped up.
— Dirt in jet.
— Spark plug worn out.
— Plug gap too
larg.
— Greasy spark plug caused by too much
fuel,
as a
result of: — leaky float
— float needle does not shut
— air filter stopped up
— choke valve partly closed.
— Breaker gap not correct. (Rupture distance.)
— Breaker points burnt. Replace!!
— H.T. coil damaged, no spark. Replace
coil.
— Faulty connection of H.T. lead in H.T. cover or H.T.
coil.
— Faulty condensor.
— Faulty reed valve
— Leaky oil seals and/or gaskets
— Slipping
V-belt
— Worn out clutch plate
— Throttle valve does not reach the bottom of the
throttle valve housing
— Exhaust silencer or exhaust port in cylinder car-
bonized.
II Engine starts well but stops after a short time. IV Bad tractive power and too high speed.
— Desaeration in fuel tank cap stopped up.
— Faulty coil insulation.
— Fuel supply partly stopped up.
Ill Idling speed remains too high, in spite of
adjustment.
— Leaky seals and/or gaskets.
— Throttle valve does not reach the bottom of the
throttle valve chamber.
— Too small jet or jet partly stopped up.
— Leaky oil seals and/or gaskets.
V Clutch does not disengage at idling speed.
Blistering of the clutch plate caused by excessive
heating.
This is mostly the result of bad handling, for
instance continual opening the gasgrip with fully
drawn rear break.
By doing so all the engine power will be converted
into the clutch.
Maximum
thick/iess
clutch plate 3.6 mm.
— Undulated
pressure-plate
and/or end plate.
— Deformed clutch hub by which pressure plate
and/or
endplate can not move.
— Faulty neediy bearing in clutch housing.
10.76
16
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