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22-2
Troubleshooting
Engine Lacks Power
1. Raise wheels off ground
Wheel don’t
Brake dragging
and spin by hands.
spin freely.
Worn or damaged wheel bearings
Wheel bearings need lubrication
2. Check tire pressure.
Pressure low.
Punctured tire
Faulty tire valve
3. Check clutch slipping.
Engine speed not
Faulty clutch spring.
changed when
Worn clutch disk/plate
Clutch is released
Wraped clutch disk/plate
4. Accelerate lightly.
Engine speed
Carburetor choke closed
doesn’t increase.
Clogged air cleaner
Clogged jets
Clogged fuel tank breather
Clogged muffler
5. Check ignition timing.
Incorrect.
Faulty ECU
Faulty crank position sensor.
Flywheel is not installed properly
6. Test cylinder compression.
Too low.
Worn cylinder and piston rings
Leaking head gasket
Improper valve timing
Faulty valve seat
7. Check valve clearance.
Incorrect.
Improper valve adjustment
Worn valve seat
8. Check fule pump fuel tube, injector
Clogged.
Clean
9. Check spark plug.
Fouled
Clean
or discolored.
Spark plug of incorrect heat range
Wheels spin freely.
Wheels spin freely.
Pressure normal.
Engine speed increased.
Correct.
Normal.
Correct.
Not clogged.
Not fouled or discolored.
Engine speed increased.
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...