Zhejiang Qianjiang Motorcycle RKV 200, Service Manual, Page: 19 / 171

19
Fault Diagnosis
Engine will not start or is hard to start.
Diagnosis procedures
Perform spark-over test
Clean deposited carbon
Spark is weak between electrodes or no spark at all. Strong blue or violet spark leaps between electrodes
Engine will not start or is hard to start
Check ignition system
Remove the spark plug and check if electrodes of the plug are connected by carbon .
Screw off spark plug cap, perform high-voltage wire spark
over test
Use an ignition timing lamp to check ignition timing
of engine
Strong blue spark leaps Weak or no spark
Check spark plug and cap
1. Check CDI ignitor 2.
Check magneto flywheel
or trigger coil for
looseness.
Loosen drain screw
of carburetor and
check if overflow
pipe is clogged
Refuel
gasoline
Check compression
pressure in the
cylinder
with a pressure gauge.
Check oil in
the fuel
tank.
Compression
pressure in
the cylinder
is normal.
Check ignition
power supply
.
Check if wires in
the ignition system
are shorted or
broken.
Check if
CDI ignitor
fails.
Non-contact battery ignition system Non-contact magneto ignition system
1. Check electric quantity
of battery; 2.Check if
low-voltage circuit is
broken or shorted; 3
Check if trigger coil is
shorted or broken.
1. Check if ignition
power supply coils are
shorted or broken; 2.
Check if trigger coil is
shorted or broken.
Compression
pressure in
the cylinder
is low.
No Yes
No Yes
Yes No
Yes
No
Check if
ignition coil
is shorted
or broken.