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22-1
Troubleshooting
Engine Does Not Starter is Hard to Start
22-1
Engine Lacks Power
22-2
Poor Performance(At Low and Idle Speeds)
22-3
Poor Performance (At High speed)
22-4
Poor Handling
22-4
22. Troubleshooting
Engine Doesn’t Start or is Hard to Start
1. Check fuel flow to fuel tube.
Not reaching
Faulty Injector
carburetor.
Fuel tank empty.
Clogged fuel tube or fuel filter.
Clogged fuel tank breather.
2. Perform a spark test.
Weak or no
Faulty spark plugs.
Stark.
Fouled spark plugs.
Faulty ECU
Broken or shorted high tension wires.
Faulty crank position sensor.
Faulty main switch.
3. Test cylinder compression.
Low compression.
Low speed of starter crank.
Incorrect valve clearance.
Faulty valve seat.
Worn cylinder and piston rings.
Seized valve.
Improper valve timing.
4. Start by following normal
Engine starts
Improper ignition timing.
procedure.
but stops.
(Faulty ECU or pulse generator.)
Fuel contaminated.
Improper ignition timing.
(Faulty ECU unit or pulse generator.)
Fuel contaminated.
5. Remove and inspect spark plug.
Wet plug.
Throttle valve open.
Air cleaner dirty.
6. Start engine again
Reaching carburetor.
Good spark.
Compression normal.
Engine does not start.
Dry plug.
Summary of Contents for DAYSTAR VL125E
Page 12: ...1 11 General Information...
Page 13: ...1 12 General Information...
Page 14: ...1 13 General Information...
Page 15: ...MEMO...
Page 23: ...MEMO...
Page 39: ...Fuel System 4 0...
Page 91: ...MEMO...
Page 96: ...MEMO...
Page 97: ...7 0 Clutch Gearshift...
Page 110: ...MEMO...
Page 111: ...8 0 A C Generator Starter Clutch...
Page 120: ...MEMO...
Page 121: ...9 0 Cylinder Head Valve...
Page 138: ...MEMO...
Page 139: ...10 0 Cylinder Piston...
Page 147: ...11 0 Crank Case Transmission Crankshaft 1 2kgf m 12N m 1 1kgf m 11N m...
Page 159: ...12 0 MEMO...
Page 166: ...13 5 MEMO...
Page 167: ...14 0 Front Wheel Front Fork Steering...
Page 189: ...15 0 Rear Wheel Rear Brake Suspension...
Page 201: ...16 0 Hydraulic Brake...
Page 213: ...17 0 Charging System Battery Regulator Rectifier Fuse Battery AC Generator...
Page 221: ...18 0 Ignition System A C Generator Spark Plug Ignition Coil ECU...
Page 226: ...18 5 Ignition System...
Page 227: ...18 6 MEMO...
Page 228: ...19 0 Electric Starter Starter Motor Battery Starter Magnetic Switch...
Page 235: ...MEMO...
Page 236: ...20 0 SERVICE Lights Switches Horn...
Page 247: ...MEMO...
Page 248: ...21 1 Wiring Diagram 21 Wiring Diagram...
Page 249: ...21 2...