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The engine runs unsteady
Problem
Solution
Ignition coil and ignition cable broken
Replace
Electric system
The ignition cable has a bad connection
Install
Dirty connections
Clean
C.D.I. failure
Replace
Fuel system
Fuel system is blocked
Clean
Bad Idle speed
Problem / Cause
Solution
Carburettor adjustment problem
Adjust the throttle screw
No idle speed
The fuel and carburettor is blocked
Clean
The fuel level in the floating chamber is too high Adjust the amount of fuel
Choke problem
Adjust
Too high idle speed
The electric choke is collected without
connection
Connect
The idle jet is too large
Replace
Higher and lower mixture strength
Adjust the carburettor
Unsteady idle speed
The air filter is blocked
Clean
Electrode distance on the spark plug is too small
Adjust to standard value
Carburettor gasket is broken
Replace
Engine overheated
Problem / Cause
Solution
The cylinder ribs are dirty
Clean
Bad cooling
No ventilation
Repair ventilator
Ventilator dirty or broken
Clean or repair
Transmission
Driving belt and clutch works badly
Adjust or replace
Mixture too thin
Adjust carburettor
Fuel System
Fuel octane too low
Replace fuel
Incorrect oil
Replace oil
Lubrication system
Too little oil
Fill oil
Automatic engine stop
Problem
Cause
Solution
No more fuel
Add fuel
The fuel system is blocked
Clean
The fuel switch is broken
Repair or replace
Fuel system
Adding fuel
does not
work
The carburettor is blocked
Clean
Spark plug
No spark from the spark plug
Control the spark plug
Cylinder and piston broken
Repair or replace
Engine noice
Other mechanical fault
Repair or replace
