Yamaha BLASTER YFS200S Owner's Manual - page 115

7. Apply Yamaha foam air filter oil or other

quality foam air filter oil to the sponge

material. If foam air filter oil is not avail-

able, engine oil may be used.

NOTE:

The sponge material should be wet but not drip-

ping.

8. Install the sponge material onto its frame

and install the screw.

9. Install the air filter element.

10. Install the air filter case cover by installing

the screws.

11. Install the seat.

NOTE:

The air filter element should be cleaned every

20–40 hours. It should be cleaned and lubricat-

ed more often if the machine is operated in

extremely dusty areas. Each time air filter ele-

ment maintenance is performed, check the air

inlet to the filter case for obstructions. Check the

air filter case rubber joint to the carburetor and

manifold fittings for an airtight seal. Tighten all

fittings securely to avoid the possibility of unfil-

tered air entering the engine.

c

C

Never operate the engine with the air filter

element removed. This will allow unfiltered

air to enter, causing rapid engine wear and

possible engine damage. Additionally, opera-

tion without the air filter element will affect

carburetor jetting with subsequent poor per-

formance and possible engine overheating.

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