9-2
Cylinder Head / Valve
Torque Values
Cam Chain Tensioner Pivot Bolt
1.1kgf-m(11N.m)
Spark Plug
1.1kgf-m(11N.m)-Apply engine oil
Camshaft Holder 8mm nut
2.0kgf-m(20N.m)-Apply engine oil
Cam Chain Tensioner Mounting Bolt
1.2kgf-m(12N.m)
Cam Chain Tensioner Sealing Screw
0.4kgf-m(4N.m)
Cylinder Head Cover Bolt
1.0kgf-m(10N.m)
Crank Shaft Hole Cap
0.8kgf-m(8N.m)
Timing Hole Cap
0.6kgf-m(6N.m)
Tools
Special
Dowel Pin Puller Set
Sliding Shaft
Sliding Weight
Valve Guide Reamer
Valve Guide Driver
Common
Valve Spring Compressor
Valve Seat Cutter
Seat Cutter IN 35 (23mm)
EX 35 (20mm)
IN 45 (24.5mm)
EX 45 (24.5mm)
IN 60 (22mm)
EX 60 (22mm)
Cutter Holder 5mm
Iow compression
Valves
- Improper valve clearance adjustment
- Broken or damaged valve spring
- Incorrect valve timing
- Faulty valve seat adherence
Cylinder head
- Leaking or damaged head gasket
- Warped or cracked cylinder head
Cylinder and piston (Refer to section 9)
Excessice smoke from muffler
Worn valve guide or valve stem
Damaged valve stem seal
Worn and damaged piston ring
Incorrect idle speed
Compression is too low
Compression is too high
Excessive carbon build-up on piston or
combustion chamber
Excessive noise
Incorrect valve clearance adjustment
Sticking valve or broken valve spring
Worn or damaged camshaft
Worn or damaged rocker arm and rocker arm
shaft
Worn or damaged cam chain
Worn or damaged cam chain tensioner
Damaged cylinder head gasket
Improper spark plug installation
Troubleshooting
Cylinder head operation problem can be diagnosed by a compression test, or by tracing noises to the
topend with a sounding rod or stethoscope.
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...