Yamaha BLASTER YFS200S Owner's Manual - page 124

8-21

EBU13020

Idle speed adjustment

NOTE:

A diagnostic tachometer must be used for this

procedure.

1. Start the engine and warm it up for a few

minutes at approximately 1,000 to 2,000

r/min. Occasionally rev the engine to 4,000

to 5,000 r/min. The engine is warm when it

quickly responds to the throttle.

2. Connect the tachometer to the spark plug

lead, and then set the idle to the specified

idling speed by adjusting the throttle stop

screw. Turn the screw in direction a to

increase the engine speed, and in direction

b to decrease the engine speed.

1. Throttle stop screw

1

a

b

Specified idle speed:

1,450–1,550 r/min

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