Checking The Auto Choke Unit - Yamaha YP250R 2005 Service Manual

CARBURETOR
2. Adjust:
• engine idling speed
Engine idling speed
1,550 ~ 1,650 r/min
Refer to
IDLING SPEED" in chapter 3.
3. Adjust:
• throttle cable free play
Throttle cable free play
(at the flange of the throttle grip)
4.0 ~ 6.0 mm (0.16 ~ 0.24 in)
Refer to "ADJUSTING THE THROTTLE
CABLE FREE PLAY" in chapter 3.
EAS00503

CHECKING THE AUTO CHOKE UNIT

NOTE:
When checking the auto choke unit, the ambi-
ent temperature must be lower than 45 °C
(113 °F).
1. Remove:
• carburetor
2. Check:
• auto choke unit
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a. Connect a 3.3 mm (0.13 in) hose 2 to the
starter air passage 1 and blow into the
hose.
NOTE:
When the starter plunger is open, air should
come out of the other side of the starter air
passage.
Starter plunger opens
Perform step (3).
Starter plunger closes
Replace the auto choke unit.
L LLL L LLL L L LLL
7 - 8
CARB
"ADJUSTING THE
M M MMM M M MMM M
L L LLL L L LLL L
ENGINE
M MMM M MMM
L LLL L LLL