21 TROUBLESHOOTING
135
Faults
Possible cause
Action
The engine cannot be cranked
(electric starter)
(TE 150 US)
Operating error
–
Carry out the start procedure.
(
Battery discharged
–
Recharge the battery.
–
Check the charging voltage.
–
Check the open-circuit current.
Main fuse blown
–
Change the main fuse. (
Starter relay faulty
–
Check the starter relay.
Starter motor faulty
–
Check the starter motor.
Engine turns but does not start Operating error
–
Carry out the start procedure.
(
Motorcycle was out of use for
a long time and there is old
fuel in the float chamber
–
Empty the carburetor float cham-
ber.
Fuel feed interrupted
–
Check the fuel tank breather.
–
Clean the fuel tap.
–
Check/set the carburetor compo-
nents.
Spark plug oily or wet
–
Clean and dry the spark plug, or
change it if necessary.
Electrode distance (plug gap)
of spark plug too wide
–
Adjust the plug gap.
Guideline
Spark plug electrode gap (TX 125 EU)
0.60 mm (0.0236 in)
Spark plug electrode gap (TE 150 US)
0.60 mm (0.0236 in)
Fault in ignition system
–
Check the ignition system.
Short circuit cable in wiring
harness frayed, kill switch
faulty
–
Check the kill switch.
The connector or ignition coil
is loose or oxydized
–
Clean the connector and treat with
contact spray.
Water in carburetor or jets
blocked
–
Check/set the carburetor compo-
nents.
Engine has no idle
Idling jet blocked
–
Check/set the carburetor compo-
nents.
Adjusting screws on carbure-
tor distorted
–
Carburetor
–
adjust the idle speed.
Spark plug defective
–
Change the spark plug.
Ignition system defective
–
Ignition coil - check the primary wind-
ing.
–
Ignition coil - check the secondary
winding.
–
Check the spark plug connector.
Engine does not speed up
Carburetor running over
because float needle dirty or
worn
–
Check/set the carburetor compo-
nents.