Reparacion motos 150

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SERVICE MANUAL 150cc Engine

TABLE OF CONTENTS
CHASSIS NUTS AND BOLTS ENGINE LUBRICATION SYSTEM FUEL SUPPLY SYSTEM TRANSMISSION COMPONENTS ELECTRICAL STARTING SYSTEM BELT DRIVE CVT MECHANISM CLUTCH REAR TRANSMISSION SYSTEM ELECTRICAL SYSTEM IGNITION SYSTEM 1 3 18 22 27 30 36 40 45 50 56

CHASSIS NUTS AND BOLTS
Note: .

Always pay attention to the unit s nuts and bolts. Some looseningafter use is normal. Check to ensure that all nuts and bolts are tight.

Torque Tightening Chart
Bolt Diameter 4 5 6 8 10 12 14 16 18 Conventional Marked Bolt N.m Kg.m Ib-ft 1~2 0.1 ~ 0.2 0.7 ~ 1.5 1~4 0.2 ~ 0.4 1.5 ~ 3.0 4~7 0.4 ~ 0.7 3.0 ~ 5.0 10 ~ 16 1.0 ~ 1.6 7.0 ~ 11.5 22 ~ 35 2.2 ~ 3.5 16.0 ~ 25.5 35 ~ 50 3.5 ~ 5.5 25.5 ~ 40 50 ~ 80 5.0 ~ 8.0 36.5 ~ 58 80 ~ 130 8.0 ~ 13.0 58 ~ 94 130 ~190 13.0 ~19.0 94 ~ 137.5 N.m 1.5 ~ 3 3~6 8 ~ 12 18 ~ 28 40 ~ 60 70 ~ 100 110 ~ 160 170 ~ 250 200 ~ 280 8.8 Marked Bolt Kg.m Ib-ft 0.15 ~ 0.3 1.0 ~ 2.0 0.3 ~ 0.6 2.0 ~ 4.5 0.8 ~ 1.2 6.0 ~ 8.5 1.8 ~ 2.8 13.0 ~ 20.0 4.0 ~ 6.0 29.0 ~ 43.5 7.0 ~ 10.0 50.5 ~ 72.5 11.0 ~ 16.0 79.5 ~ 115.5 17.0 ~ 25. 123.0 ~ 181.0 20 ~ 28.0 144.5 ~ 202.5

FUEL SWITCH (PETCOCK)
• Periodically clean the petcock externallywith grease remover and water. • Check for any leaks or seeping fuel. • Replace the petcock if there are any leaks found. This vehicle has a manually operated fuel valve. There are three positions.

“ON” position
The normal operating position for the fuel valve lever is the “ON” position. In this position, fuel will r.

“RES” position
If the fuel level in the fuel tank becomes too low forthe engine to operate with the fuel valve lever in the “ON” position, turn the lever to the “RES” position to use the reserve fuel supply, and refuel as soon as possible.

“OFF” position
The closing position for the fuel valve is the “OFF” position. When the vehicle is not in use, always make sure the petcock is in the “OFF” position.

unit

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gear

2

ENGINE
ENGINE COMPONENTSINSPECTION AND SERVICING ENGINE COMPONENTS AND CRANK CONNECTING ROD MECHANISM INSPECTION AND SERVICING

ENGINE COMPONENTS: CYLINDER
CYLINDER REMOVAL
The removal can be done on the vehicle body. • Remove cylinder head. • Remove cylinder. • Remove cylinder gasket, bolts • Clean cylinder gasket and remove any debris. Caution! Do not damage the cylinder area. Make sure not to drop anything,including cylinder gasket material, into the crankcase.

CYLINDER INNER WALL WEAR INSPECTION
Use a bore diameter dial gauge to measure the degree of wear. The measure point is divided into three sectional planes in the axial direction: upper, middle and lower; measure every plane each time on the mutually perpendicular directions (X, Y), the measured least dimension is the cylinder bore; at the mostupper position measured is the largest diameter, and the lowest position measured is the smallest diameter, their difference is the cylindricity of the cylinder. At the same cross section, measure the difference of diameter between two points mutually perpendicular; which is the circularity of the cylinder. In order to make the measuring point perpendicular with the bore axis of the cylinder, andto ensure the precision of the measurement, the bar of the gauge can be slightly swung in the direction of the gauge bar, and take the smallest reading number as the result. In the situation without a dial gauge, a feeler gauge can be used to make relativity measurement. put a new piston into the cylinder, and use the feeler gauge to measure the gap between the piston skirt and the cylinder wall.T hen gure out the abrasion loss of the cylinder. If the circularity of the cylinder exceeds the limit, then a cylinder reboring machine should be used to rebore the cylinder, and enlarge its diameter by 0.5mm or 1.00mm, then t the piston and piston ring which size are also enlarged. If the wear is too severe and cannot be reworked, then a new cylinder should be installed.
Cylinder bore...
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