Defects And Their Remedies - JAWA babetta 28 Servicing Instructions

VI. DEFECTS AND THEIR REMEDIES
Discovered failure
Correct
spark
Correct
spark
Irregular
spark
Clutch slips.
Page 8
Engine overheats.
Plug electrodes are overheated, the faulty
plug (not corresponding thermal value).
Too much carbon in the cylinder head and
in the exhaust duct.
Big advanced ignition.
Exhaust silencer choked.
Water or oil in carburetor.
Insufficient fuel supply into carburettor.
Leakage in the crank case
Poor mixture (white exhaust gas)
Incorrectly mixed petrol with oil.
Not suitable plug
Oiled plug
No fuel in the tank.
The fuel tap in the supply piping is closed
or insufficiently opened.
Choked fuel filter above the tap.
The choked piping or strainer in the
carburetor.
The choked hole in the plug hole.
The choked nozzle in carburetor.
Leaky float,
Needle valve does not shut.
Oiled plug.
Damaged plug insulation.
Short circuit between the plug electrodes.
Big distance of plug electrodes.
Bonding of plug to the frame due to water
or mud.
Burnt cable insulation.
Damaged cable shoe.
Faulty Tranzimo unit or transistor only.
Broken piston ring.
Seized piston ring.
Sealing under the plug is leaky.
Seized piston.
Overheated engine.
Insufficient lubrication.
Broken gas cable.
Bad sealing between the carburettor and
cylinder.
Too much settled carbon in the cylinder,
head and exhaust silencer.
Partially choked fuel supply.
Wrong adjustment of firing.
Wrongly regulated carburetor.
Seized carburettor mover.
Choked exhaust silencer.
Worn interior of lid and piston.
The engine sucks false air (the box halves
or carburettor flange do not seal).
Damaged sealing ring.
The cylinder head does not seal.
The brake shoes rub against the drums.
Choked air filter.
Partially choked fuel supply or the strainer
in the top of carburettor.
The gas cable seizes.
Faulty plug.
Overheated engine.
Fallen out needle lock in carburettor
Dirty clutch jaws.
Babetta type 28 owners handbook pages 41 to 45
www.jawamoped.com
Remedy
Wait till the engine is cooled do not run at high speed.
Change the plug.
Remove the head and dismantle the exhaust, remove
the carbon.
Regulate the advanced ignition.
Dismantle the silencer & clean it.
Clean the carburetor.
Open fully the fuel tap (especially the reserve), refill
the fuel, check the supply piping, clean the aerating
hole in the plug.
Check the tightness of crank case and change the
sealing if required.
Adjust the carburettor, clean the nozzle.
Mix correctly the fuel
Change the plug
The plug is to be screwed out and cleaned
Open the fuel tap to reserve.
Open the fuel tap.
The fuel tap be removed & filter cleaned.
Dismantle the piping & carburetor and clean the nozzle
and blow it through.
Clean the de-aerating hole.
Screw out the nozzle and clean it.
Solder or change it.
Change the damaged valve.
Change the plug or clean it.
Change the plug.
The electrodes are to be seperated to the distance of
abt. 0.7 mm.
The electrodes are to be brought to the distance of
0.7 mm.
Change and dry the terminal the plug and the cable
The cable is to be wound with insulating tape and
changed as soon as possible, change the terminal.
Change the cable shoe.
Change the Tranzimo unit or transistor only.
Remove ring from the piston & replace it by new one.
Remove the ring, clean it and put it in again.
Replace the sealing by a new one.
Dismantle and repair.
The engine is to be allowed to cool down and to be
held on lower speed.
Care be taken the oil with petrol is in correct ratio and
throughly mixed through.
Change the cable or repair it.
Change the sealing, tighten the flange.
Dismantle the head, cylinder, and exhaust and remove
the carbon.
Diamantle the piping and clean it.
Adjust the advanced ignition.
Adjust idle run, needle position & clean the air filter.
Loosen the mover and adjust it.
Clean the exhaust silencer.
New re-bore of cylinder, new piston and rings.
The box halves are to be seperated , the contact
surfaces be cleaned, the sealing substance be applied
and mount firmly, change the sealing under the
carburetor flange.
Change the sealing ring.
Grind it.
Adjust the brakes.
Clean it.
The fuel supply or the strainer are to be cleaned.
Oil the cable, respectively change it.
Change the plug.
Let the engine cool down and keep it on low speed.
New lock.
Clean the jaws, check sealing of clutch (sealing rings).
jkw