Yamaha VX250A Owner's Manual page 97

Trouble
C. Engine idles
irregularly or stalls.
Possible Cause
1. Spark plug(s) fouled or incorrect type.
2. Fuel system obstructed.
3. Fuel contaminated or stale.
4. Fuel filter clogged.
5. Failed ignition parts.
6. Warning system activated.
7. Spark plug gap incorrect.
8. Poor connections or damaged ignition
wiring.
9. Specified engine oil not used.
10. Thermostat faulty or clogged.
11. Fuel pump damaged.
12. Air vent screw on the fuel tank closed.
13. Motor angle too high.
14. Fuel joint connection incorrect.
15. Throttle valve adjustment incorrect.
16. Battery lead disconnected.
1. Inspect spark plug(s). Clean or
replace with recommended type.
2. Check for pinched or kinked fuel line
or other obstructions in fuel system.
3. Fill tank with clean, fresh fuel.
4. Clean or replace filter.
5. Have serviced by a Yamaha dealer.
6. Find and correct cause of warning.
7. Inspect and adjust as specified.
8. Check wires for wear or breaks.
Tighten all loose connections.
Replace worn or broken wires.
9. Check and replace oil as specified.
10. Have serviced by a Yamaha dealer.
11. Have serviced by a Yamaha dealer.
12. Open the air vent screw.
13. Return to normal operating position.
14. Connect correctly.
15. Have serviced by a Yamaha dealer.
16. Connect securely.
5-2
E
Remedy