Yamaha MX360 - Engine Speed Is Uneven; The Battery Is Not Charged

ENGINE SPEED IS UNEVEN
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TROUBLESHOOTING
ENGINE SPEED IS UNEVEN
THE BATTERY IS NOT CHARGED (Equipped models)
No. Checking steps Possible remedy
1 Check the fuel level. Add the fuel if it is insufficient.
2 Check if fuel has deteriorated. Replace the fuel.
3 Check if the fuel cock is clogged. Clean.
4 Check the spark plug for dirt and check the spark plug gap. Clean, adjust, or replace the spark plug.
5 Check the carburetor pilot screw turn out and float height. Adjust or replace.
6
Check if there is air suction from the carburetor joint, gas-
ket, or throttle shaft.
• Tighten the carburetor nuts securely.
• Replace the carburetor joint or gasket
wit
h a new one.
7
Check if the slow or main passages such as
, pilot jet and
main jet, in the carburetor are clogged.
Clean the parts.
8
Check the valve clearance.
(Refer to “ADJUSTING THE VALVE CLEARANCE” on
page 2-12)
Adjust the valve clearance.
9
Check the valve face and valve seat for wear.
(Refer to “VALVE” on page 3-37)
Resurface or replace the valve face and
v
alve seat.
10
Check if there is seizure, wear, or damage on the piston,
piston ring, or cylinder.
(Refer to “PISTON, CAMSHAFT, CRANKCASE, AND
CRANKSHAFT” on page 3-44)
Rebore or replace.
No. Checking steps Possible remedy
1
Check the fuse.
(Refer to “CHECKING THE FUSE (Equipped models)” on
page 5-8)
Replace the fuse.
2 Check the battery.
• Clean the battery terminals.
• Recharge or replace the battery.
3
Check the charging coil.
(Refer to “CHECKING THE CHARGING COIL (Equipped
models)” on page 5-19)
Replace the charging coil assembly.
4
Check the entire charging system’s wiring.
(Refer to “CIRCUIT DIAGRAM” on page 5-1)
Properly connect or repair the charging
s
ystem’s wiring.
5 The charging system circuit is OK. —