3-40
TROUBLESHOOTING
INSPECTION STEPS
If the aforementioned problems have occurred, perform the following inspection steps in the order
given.
Check that the fuel tank is filled with
fresh gasoline.
No good
→
Fill the fuel tank.
OK ↓
Check that the fuel tank breather hose is
not clogged. (Refer to "INCLUDED
PARTS" section in the CHAPTER 1.)
No good
→ Repair or replace.
OK ↓
Adjusting the engine idling speed(Refer
to "ADJUSTING THE ENGINE IDLLING
SPEED" section in the CHAPTER 3.)
No good
→ Adjust.
OK ↓
Check that the fuel hose is connected
properly and is not kinked or pinched.
No good
→
Repair.
OK ↓
Check the spark plug for dirt, the spark
plug gap, and the spark plug cap. (Refer
to "CHECKING THE SPARK PLUG"
section in the CHAPTER 3.)
No good
→
Clean or adjust.
OK ↓
Check that the air filter element is in-
stalled correctly and is not clogged. (Re-
fer to "CLEANING THE AIR FILTER"
section in the CHAPTER 3.)
No good
→
Clean or repair.
OK ↓
Checking the sensors, injector and igni-
tion coil connection.
No good
→
Repair or replace.
OK ↓
Installed condition of ECU (Refer to
"CHECKING THE ECU" section in the
CHAPTER 7.)
No good
→ Repair.
OK ↓
Check the assembled condition of the
throttle body, and check the throttle
valve and its surrounding parts for dirt.
No good
→ Repair or clean.
OK ↓
Consult a Yamaha dealer.
