roof YAMAHA YZ250LC 2004 Owners Manual

6-12
TPS (THROTTLE POSITION SENSOR) SYSTEMELEC
2
1
2 43
YL
B
4. Install:
9TPS 1
9Screw (TPS) 2
NOTE:
9Align the slot ain the TPS with the projection
bon the carburetor while the lever 3is held
down.
9Temporarily tighten the screws (TPS).
5. Install:
9Mixing chamber top
9Carburetor
Refer to “CARBURETOR AND REED
VALVE” section in the CHAPTER 4.
6. Adjust:
9Idle speed for TPS adjustment
Idle speed for TPS adjustment:
1,700~1,900 rpm
Adjustment steps:
9Set the inductive tachometer (engine
tachometer) to the high tension cord.
9Turn the throttle stop screw 1until the
specified idle speed.
Refer to “IDLE SPEED ADJUSTMENT” sec-
tion in the CHAPTER 3.
7. Insert the thin electric conductors 2(lead
wire) into the TPS coupler 1, as shown,
and connect the tester to them.
cC
9Do not insert the electric conductors
more than required because it may
reduce the waterproof function of the
coupler.
9Make sure that a short-circuit does not
develop between the terminals because it
may cause damage to electrical compo-
nents.
Tester (+) leadYellowlead 3
Tester (–) lead
Blacklead 4
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