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TROUBLE CAUSE REMEDY
Engine does not rev up Carburetor fuel level too high because float
needle valve is dirty or worn out
Loose carburetor jets
Electronic ignition timing faulty
Dismount carburetor and check if worn out
Tighten jets
Have ignition system checked
Engine will not reach full power Fuel supply partially interrupted or carbu-
retor dirty
Float leaks
Air filter very dirty
Exhaust system is not tight, deformed, or
the silencer does not contain enough glass-
fiber yarn
Valve gap too small
Electronic ignition timing faulty
Clean and check fuel system as well as carburetor
Replace the float
Clean or replace air filter
Check if exhaust is damaged, replace glasfiber yarn in
exhaust silencer
Adjust valve gap
Have ignition system checked
Engine stops or splutters in
carburetor
Insuffient fuel
Engine takes air out of control
Clean and check fuel system and carburettor
Check rubber sleeve and carburetor for tight fit
Engine gets too hot Insufficient cooling liquid
Not enough air stream
Cooling system has not been bled
Radiators very dirty
Foam formation in cooling system
Bent cooling hose
Refill cooling liquid (see maintenace work), check cooling
system for leaks
Drive on briskly
Bleed cooling system
Clean radiators with water jet
Replace cooling liquid, use antifreeze liquid with brand name
Shorten or replace cooling hose
High oil consumption Hose of engine ventilation is bent
Engine oil level too high
Motor oil too thin (viscosity)
Dislocate i.e. replace non-buckling vetilation hose
Check engine oil level and, if necessary, correct it
Use thicker engine oil; see chapter “Engine oil“
The battery is discharged The battery isn’t charged by the generator
because
Remove seat and fuel tank and check voltage regulator con-
nections; voltage regulator and generator should be checked
by a KTM dealer.