PERIODIC INSPECTION AND ADJUSTMENT
35
Insufficient compressure will bring about perfor-
mance degradation.
1. Check
Valve clearance
Out of specification
Adjust clearance
Refer to
Valve clearance adjustment
2. Start the engine, and pre-warm it for several
minutes.
3. Stop the engine
4. Disassemble: spark plug
5. Install
Pressure indicator
Connector
Note
6. Check
Compressure
******************************************
Checking steps
Start the engine with the kick starting device or the
electric starter when the throttle is opened fully until
the reading of the pressure indicator reaches a maxi-
mum value, and then read it.
Check the reading by the specification.
7. Install
Spark plug, spark plug cap
Too lower compressure
A.The throttle joints badly, which gives rise to com-
pressive leak.
B.Bad adjustment of the throttle clearance.
C.Wear the piston, cylinder and piston ring
Too higher compressure
A. Carbon deposit of the cylinder head chamber
B. Carbon deposit of the piston head
*******************************************
The Connector of the pressure indicator
Standard compressure value:
1200kPa (12kg/cm
2
)
Inspect compression pressure
Содержание JS125-6B
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Страница 11: ...CHAPTER 1 GENERAL INFORMATION...
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Страница 19: ...CHAPTER 2 SPECIFICATIONS...
Страница 20: ...10 SPECIFICATIONS General specifications SAE 20W 40 SAE 10W 30...
Страница 21: ...SPECIFICATIONS 11...
Страница 22: ...12 SPECIFICATIONS...
Страница 23: ...SPECIFICATIONS 13 Check the Specification...
Страница 24: ...14 SPECIFICATIONS...
Страница 25: ...SPECIFICATIONS 15...
Страница 26: ...16 SPECIFICATIONS...
Страница 27: ...SPECIFICATIONS 17...
Страница 28: ...18 SPECIFICATIONS Lock torque Engine...
Страница 29: ...SPECIFICATIONS 19 Body frame...
Страница 31: ...SPECIFICATIONS 21 Lubrication point and type of lubricants Engine...
Страница 32: ...22 SPECIFICATIONS Body YAMAHA 4 Stroke engine oil Light lithium base grease Special grease...
Страница 34: ...24 SPECIFICATIONS Cam shaft Filter net assy Crankshaft assy Main axle Drive axle Clutch assy...
Страница 35: ...CHAPTER 3 PERIODIC INSPECTION AND ADJUSTMENT...
Страница 63: ...CHAPTER 4 ENGINE...
Страница 99: ...ENGINE 89 Gear shift cam and fork Fork guide rod 1 Fork 3 Fork 1 Cam Star gear Fork guide rod 2 short...
Страница 116: ...106 ENGINE Cylinder and piston Cylinder O ring Gasket Dowel pin Piston ring Piston pin circlip Piston Piston pin...
Страница 125: ...CHAPTER 5 CHASSIS...
Страница 126: ...116 CHASSIS Front wheel Lock nut Instrument gears Front wheel axle Spacer Front wheel assy Spacer assy Front wheel assy...
Страница 135: ...CHASSIS 125 Brake shoes Camshaft lever Rear brake Indicator plate Brake camshaft...
Страница 156: ...146 CHASSIS Rear shock absorber and rear arm Rear shock absorber Nut Rear arm Connection rod Chain cover...
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Страница 159: ...CHAPTER 6 CABLE AND ELECTRIC APPLIANCE SYSTEM...
Страница 168: ...CABLE AND ELECTRIC APPLIANCE SYSTEM 158 Electric device principle...
Страница 169: ...159 Electric appliance...
Страница 170: ...CABLE AND ELECTRIC APPLIANCE SYSTEM 160...
Страница 175: ...CABLE AND ELECTRIC APPLIANCE SYSTEM 165 Ignition system diagram...
Страница 179: ...CABLE AND ELECTRIC APPLIANCE SYSTEM 169 Electric start system...
Страница 188: ...CABLE AND ELECTRIC APPLIANCE SYSTEM 178 Charging system...
Страница 191: ...CABLE AND ELECTRIC APPLIANCE SYSTEM 181 Lighting system...
Страница 196: ...CABLE AND ELECTRIC APPLIANCE SYSTEM 186 Signal system...
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Страница 205: ...CHAPTER 7 TROUBLESHOOTING...
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