Sym JET 4 R 50 Series - Service Maintenance Information; General Information

2. Service Maintenance Information
2-1
General Information·······························2-1
Periodical Maintenance Schedule········2-2
Air Cleaner··············································2-3
Fuel Lines ···············································2-3
Fuel Filter················································2-4
Engine Oil Line·······································2-4
Oil Pump Control Cable·························2-5
Battery·····················································2-5
Tire ··························································2-6
Rear Drum Brake Free Play···················2-6
Disc Brake System Hose·······················2-错
误！未定义书签。
Steering System·····································2-9
Suspension·············································2-9
Transmission Oil··································· 2-10
Spark Plug············································· 2-10
Control Cable Lubrication···················· 2-11
Driver Belt·············································· 2-11
Ignition Timing······································ 2-11
Throttle Valve Operation······················ 2-11
Carburetor Idle Speed Adjustment ····· 2-12
Cylinder Compression Pressure Test· 2-12
Headlight Adjustment··························· 2-13
General Information
Specification
Item Jet 4 R 50 series
Tire dimension Front:120/60–13, Rear: 130/70-12
Tire pressure at cold Only rider Front: 2.0 kg/cm
2
, Rear: 2.0 kg/cm
2
Rear brake lever free play 10~20 mm
Transmission oil / Recommendation
Type: HYPOID GEAR OIL
Oil: SAE #140 Quantity: 0.12 L, Replacement: 0.11L
Spark plug / Recommendation Type:BR8HSA / Plug gap: 0.6-0.7mm
Driving belt width Standard 18.0mm
Ignition timing F mark
13°, BTDC/1700 rpm
Acceleration operation 2~6 mm
Idle speed
1900±100 rpm
Cylinder compression pressure
7±1 kgf/cm²