Mash Dirt Track 50CC, User Manual

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Reinstall the filter in reverse order. Make sure the filter element is
firmly fixed in correct position and reliably sealed.
Carburetor
A stable carburetor is the basis of guaranteeing the engine performance.
Before leaving the factory, carburetor has been adjusted to the best condition.
Any unnecessary adjustment shall be avoided. Please note that, there are two
adjustment items for carburetor, i.e., accelerator wire clearance and idle speed.
Carry out adjustment after the first 1000 km and every 3000 km thereafter, as
follows.
Warining :
Before and during cleaning, pay attention to check the filter element
for any contamination, crack or damage. Replace it with a new one when
necessary.
Reinstall the filter in reverse order. Make sure the filter element is
firmly fixed in correct position and reliably sealed.
Never start the engine without the air filter installed. The air filter
element must be cleaned or replaced more frequently if the motorcycle is
used in dusty conditions. Never start the engine without the filter
element installed, or the engine wearing may be
increased. Be sure to the
air filter element is in good working conditions, because this part is very
important to engine service life.