Dual-Filter-Element Types - Yamakoyo YK250 Owner's Manual

If you operate the engine in very dusty areas, clean the air filter more often than
specified in the MAINTENANCE SCHEDULE.
NOTICE
Operating the engine without an air filter, or with a damaged air filter, will allow dirt to
enter the engine, causing rapid engine wear. This type of damage is not covered by the
Distributor's Limited Warranty.

Dual-Filter-Element Types

1. Remove the wing nut from the air cleaner cover,
and remove the air cleaner cover.
2. Remove the wing nut from the air filter, and remove
the filter.
3. Remove the foam filter from the paper filter.
4. Inspect both air filter elements, and replace them if
they are damaged. Always replace the paper air
filter element at the scheduled interval.
5. Clean the air filter elements if they are to be reused.
Paper air filter element: Tap the filter element several times on a hard surface to
remove dirt, or blow compressed air [not exceeding 30 psi (207 kPa)] through the
filter element from the inside. Never try to brush off dirt; brushing will force dirt into
the fibers.
Foam air filter element: Clean in warm soapy water, rinse, and allow drying thoroughly.
Or clean in nonflammable solvent and allow drying. Dip the filter element in clean
engine oil, and then squeeze out all excess oil. The engine will smoke when started
if too much oil is left in the foam.
6. Wipe dirt from the inside of the air cleaner base and cover, using a moist rag. Be
careful to prevent dirt from entering the air duct that leads to the carburetor.
7. Place the foam air filter element over the paper element, and reinstall the assembled
air filter. Be sure the gasket is in place beneath the air filter. Tighten the air filter
wing nut securely.
8. Install the air cleaner cover, and tighten the cover wing nut securely.
MAINTENANCE
17
AIR
CLEANER
COVER
PAPER
FILTER
ELEMENT
FOAM
FILTER
ELEMENT
GASKET