12 Electrical System
12-43
12.17 Fault Diagnosis
12.17.1 Engine Body
Trouble Reason Solution
Engine cannot start
Inspect the
electrical system
● Fuse melted
● Battery low
● Cable problem
Inspect the spark plug
● Ignition coil bad connection
● High voltage bad
connection
● RPM sensor trouble
● Magneto trouble
● Spark plug clearance not t
● Spark plug dirty
● Spark plug too wet
Inspect fuel supply system
● Canister
● Fuel pump leaking or bad
eect
● Fuel line leaking
● Fuel low
● Injector jammed
4. Inspect cylinder pressure
● Cylinder wearing
● Piston ring wearing
● Gasket leaking
● Valve conducting pipe
wearing
● Valve seat bad sealing
● Valve wearing
● Spark plug loose
● Starting RPM low
● Valve TDC wrong
● Valve clearance not t
5. Idle by pass valve jammed
6. Not in N gear
7. Fault code
Inspect or replace
Inspect or charge
Inspect or replace
Inspect or replace
Inspect or replace
Inspect or replace
Inspect or replace
Adjust or replace
Clean or replace
Dry or replace
Repair and replace
Inspect or replace
Inspect the fuel tank
Replace
Replace
Replace
Replace
Replace
Repair or replace
Replace
Tighten
Inspect or replace
Adjust
Adjust
Clean or replace
Shift to N gear
Inspect
Engine hard to start
1. Idle valve bad
2. TPS not in 0
3. Adjust the throttle cable
4. Engine pressure low
5. Inspect the spark plug
● Spark plug bad
● Spark plug setting bad
● Spark plug damage
● Spark plug dirty
6. Fuel low or pressure low
7. CAPS or cable bad
See engine
See engine
Inspect the reason
Replace the parts
© CFMOTO Powersports, Inc. This manual is subject to all applicable copyright laws.
Reproduction or duplication in any form, whole or in part, is strictly prohbited.
To Next Page