Section 14 Instrument - ZONGSHEN ZS125-86 Service Manual

The motorcycle instrument shows the operation condition of the motorcycle.
1. Structure and Working Principles of the Instrument
[1]Odometer
The odometer shows the current speed and the cumulative mileage of the motorcycle. It is driven by
the front wheel. The rotate speed of the front wheel passes through the transmission mechanism, via
the flexible shaft to the odometer, so that the cylinder rotates. The eddy current disc cutting the magnetic
line of force generates an eddy current and a magnetic field, which interact with the magnetic field of the
magnetic cylinder. Consequently, the eddy current disc is subjected to a torsional moment to overcome the
gossamer resistance and to cause the pointer to rotate. The higher the speed, the stronger the magnetic
field of the eddy current disc. Thus the torsional moment and the angle of deflection increases, so the
pointer has an increased angle of deflection and points to a higher speed on the panel. At the same time,
the rotated spindle drives the counter through the worm, and the counter shows the cumulative mileage of
the motorcycle.
2. Demolition and Maintenance of the Instrument
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Section 14 Instrument

Check the
instrument
Check the wiring
The odometer should be maintained once a
year, and be lubricated at necessary locations.
[2.]Fuel gauge
The fuel gauge shows the oil amount in the
fuel tank. The fuel gauge shows the oil changes
indicated by the fuel indicator, which receives
changes in sensor resistance due to the height
changes in oil level.
[1] When instrument indicators cannot work
properly, it is necessary to dismantle and check the
odometer.
[2] Check if the instrument wiring is loose.