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Derbi BOULEVARD 50 2T Workshop Manual page 40

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Troubleshooting
Brakes overheating
Possible Cause
Defective piston sliding
Brake disc or drum deformed
Electrical system
Battery
Possible Cause
Steering and suspensions
Rear wheel
Possible Cause
Idle speed set too high
Faulty clutch
Heavy steering
Possible Cause
Torque not conforming
Excessive steering play
Possible Cause
EXCESSIVE STEERING CLEARANCE
TROUBL - 40
BRAKES OVERHEATING
BATTERY
Battery
REAR WHEEL
STEERING HARDENING
EXCESSIVE STEERING CLEARANCE
Operation
Check calliper and replace any damaged part.
Using a dial gauge, check the planarity of the disk with the
wheel correctly fitted or the concentricity of the rear drum.
Operation
The battery is the electrical device in the system that requires
the most frequent inspections and thorough maintenance. If the
vehicle is not used for some time (1 month or more) the battery
needs to be recharged periodically. The battery runs down
completely in the course of 5 ÷ 6 months. If the battery is fitted
on a motorcycle, be careful not to invert the connections, keep-
ing in mind that the black ground wire is connected to the
negative terminal while the red wire is connected to the terminal
marked+. Follow the instructions in the ELECTRICAL SYSTEM
chapter for the recharging of the batteries.
Operation
Adjust idle speed. Adjust C.O. if necessary
Check springs / frictional weights and clutch housing.
Operation
Check the tightening of the top and bottom ring nuts.
If irregularities continue in turning the steering even after mak-
ing the above adjustments, check the seats in which the ball
bearings rotate: replace if they are recessed.
Operation
Check the tightening of the top and bottom ring nuts.
If irregularities continue in turning the steering even after mak-
ing the above adjustments, check the seats in which the ball
bearings rotate: replace if they are recessed.

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