Adjust or replace valves and set valve lash
Wear, incorrect closing or incorrect valve switching causes incomplete fuel
combustion. They should be checked and adjusted periodically. If they are visibly
worn, replace them with new ones. It is especially important to set the valve lash
properly so that it gives a good enough mixture.
Change the engine oil
When changing the engine oil, the level must not exceed the upper value: if the oil
level is too high, the oil pressure increases, which can cause engine leakage and
increased oil consumption.
Correctly set ignition time
Only an intense spark can cause full combustion and full engine power, fuel savings
and reduced emissions to the environment.
Perform engine repairs and vehicle inspections