Air Filter Inspection; Air Cleaner Service; Ambient Temperature - Yamakoyo YK250 Owner's Manual

SAE 10W-30 is recommended for general use. Other viscosities shown in the chart may
be used when the average temperature in your area is within the recommended range.
The SAE oil viscosity and service classification are in the API label on the oil container.
We recommend that you use API SERVICE Category SE or SF oil.

AIR FILTER INSPECTION

Remove the air cleaner cover and inspect the filter. Clean or replace dirty filter elements.
Always replace damaged filter elements. If equipped with an oil-bath air cleaner, also
check the oil level.
FILTER

AIR CLEANER SERVICE

A dirty air filter will restrict air flow to the carburetor, reducing engine performance.
MAINTENANCE
SAE Viscosity Grades
10W-30
5W-30
-20 0 20 40
-30 -20 -10 0

AMBIENT TEMPERATURE

16
30
60 80 100 F
10 20 30 40
PAPER
FILTER
ELEMENT
FOAM
FILTER
ELEMENT