Sym Jet Euro X servicemanual - Scootergrisen

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Maintenance Information·················· 5-2 Troubleshooting································ 5-2 Home page Contents 5. CYLINDER HEAD/CYLINDER/PISTON Cylinder Head ·····································5-3 Cylinder/Piston···································5-5 5-1 5
5. CYLINDER HEAD/CYLINDER/PISTON Maintenance Information Precautions In Operation The inspection and maintenance of the cylinder head, cylinder and piston can be carried as engine mounted on the body. It should clean the engine to prevent dirt from entering into cylinder and crankcase before removal. Remove all washes from the interfaces of cylinder head, cylinder and crankcase. Be careful do not damage cylinder head, cylinder and piston when removing. Inspect the removed & cleaned parts thoroughly, and apply with oil onto the rotation surfaces before installation. Specification Cylinder head 5-2 Item Standard value (mm) JET 50 series JET 100 series Limit (mm) Standard value (mm) Limit (mm) Deformation - 0.100 - 0.100 Piston OD 39.030~39.045 38.935 51.030~39.045 50.935 Clearance between cylinder and piston 0.040~0.050 0.100 0.040~0.050 0.100 Piston pin hole 12.002~12.008 12.030 14.002~14.008 14.030 Piston pin OD Piston Clearance between piston and piston pin 11.994~12.000 0.002~0.014 11.970 0.030 13.994~14.000 0.002~0.014 13.970 0.030 Piston ring end gap 0.100~0.250 0.400 0.100~0.250 0.400 ID of connecting rod small end 17.05~17.015 17.025 17.05~17.015 17.025 ID Cylinder Deformation 39.000~39.015 - 39.050 0.100 51.000~51.015 - 51.050 0.100 ID: inner diameter OD: outer diameter Tighten torque value Cylinder head 1.0 kgf-m Exhaust pipe connection nut 1.2 kgf-m Spark plug 1.4 kgf-m Exhaust muffler mounting bolt 3.3 kgf-m Troubleshooting Compression Pressure Too Low/Difficult To Start/Rough Idling 1. Cylinder head gasket leaking 2. Spark plug not tighten enough 3. Worn, seized or crack piston ring 4. Damaged, worn cylinder or piston 5. Poor reed Compression Pressure Too High/Overheat/Knock 1. Too much carbon deposit built up in combustion chamber This chapter Contents Piston Noise 1. cylinder and piston worn out 2. piston pin or piston pin hole worn out 3. connecting rod small end bearing worn out Piston Ring Noise 1. Worn, seized or crack piston ring 2. Cylinder worn out or damaged
Page 1 and 2: Forward Contents How To Use This Ma
Page 3 and 4: How to Use This Manual This service
Page 5 and 6: MODEL ILLUSTRATION JET 50 / 100 Ser
Page 9: 1. GENERAL INFORMATION General Safe
Page 14 and 15: Torque values 1. GENERAL INFORMATIO
Page 17 and 18: 1. GENERAL INFORMATION 1-10 Starter
Page 19 and 20: 1. GENERAL INFORMATION 1-12 Fuel pu
Page 21 and 22: 1. GENERAL INFORMATION B. Engine ru
Page 23 and 24: 1. GENERAL INFORMATION E. CLUTCH, D
Page 25: 1. GENERAL INFORMATION Note: 1-18 T
Page 30: Oil Pump Control Cable Caution To a
Page 35 and 36: 2. SERVICE MAINTENANCE INFORMATION
Page 39 and 40: 2. SERVICE MAINTENANCE INFORMATION
Page 41 and 42: 3. LUBRICATION SYSTEM Precautions I
Page 43 and 44: 3. LUBRICATION SYSTEM Oil Pump/Oil
Page 45 and 46: 3. LUBRICATION SYSTEM NOTES: 3-6 Th
Page 47 and 48: 4. ENGINE REMOVAL Engine removal Re
Page 49: 4. ENGINE REMOVAL Remove engine mou
Page 53 and 54: 5. CYLINDER HEAD/CYLINDER/PISTON Cy
Page 55 and 56: 5. CYLINDER HEAD/CYLINDER/PISTON Us
Page 58: Maintenance Information ·····
Page 61 and 62: 6. ALTERNATOR Disconnect alternator
Page 63 and 64: 7. “V” TYPE BELT DRIVE SYSTEM/K
Page 78 and 79: Disassembly of Final Driving Mechan
Page 80 and 81: Install countershaft, final driven
Page 82: Maintenance Information······
Page 85 and 86: 9. CRANKCASE/CRANKSHAFT Crankshaft
Page 87 and 88: 9. CRANKCASE/CRANKSHAFT Assemble th
Page 90: Throttle Valve Removal Remove the b
Page 94 and 95: Flaot Level Inspection Measure floa
Page 96 and 97: Air Cleaner Removal/Installation Lo
Page 98 and 99: Front Disc Brake System ·····
Page 100 and 101:
Maintenance Information Precautions
Page 102 and 103:
Hydraulic Disc Brake Close the drai
Page 104 and 105:
Brake Disc Inspection Visually chec
Page 106 and 107:
Install the rubber pad into the gro
Page 108 and 109:
Installation Apply with a thin coat
Page 110 and 111:
Body Overview ··········
Page 112 and 113:
Side Covers 1. Removal: Remove 3 s
Page 114 and 115:
Remove 2 screw form of the body cov
Page 117 and 118:
12. BODY COVER Front Inner Box 1. R
Page 119 and 120:
12. BODY COVER Steering Handle Cove
Page 121 and 122:
12. BODY COVER Note: 12-12 This cha
Page 124 and 125:
Steering Handle Removal Remove hand
Page 126 and 127:
Inspection Place the axle onto a V-
Page 128 and 129:
Lubricate the speedometer gear with
Page 130 and 131:
Front Fork Removal Handle Front w
Page 132 and 133:
Maintenance Information······
Page 134 and 135:
Rear Wheel Remove Remove exhaust pi
Page 136 and 137:
Maintenance Information······
Page 138:
Troubleshooting No voltage Battery
Page 141:
15. ELECTRICAL EQUIPMENT Current Le
Page 149 and 150:
15. ELECTRICAL EQUIPMENT Starter Mo
Page 152 and 153:
Switch / Horn Remove handle covers
Page 154 and 155:
Bulb Replacement Headlight/position
Page 156 and 157:
Clock unit - JET EURO 50/100 Remove
Page 158 and 159:
JET 50 ELECTRICAL DIAGRAM Home page
Page 160 and 161:
JET 100 ELECTRICAL DIAGRAM Home pag
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Sym Jet Euro X servicemanual - Scootergrisen

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