2006 YAMAHA WR 450F engine

[x] Cancel search: engine

Page 677 of 786

YAMAHA WR 450F 2006  Owners Manual –+ELEC
ZÜNDFUNKENSTRECKE 
KONTROLLIEREN
1. Das Zündkabel von der Zünd-
kerze abziehen.
2. Den Stecker von der Zündspule
abziehen.
3. Den Zündfunkenstrecken-Tester
1 (Zündungstester 2), wie in

Page 682 of 786

YAMAHA WR 450F 2006  Owners Manual 6 - 7
–+ELEC
ELECTRIC STARTING SYSTEM
STARTING CIRCUIT CUT-OFF SYSTEM 
OPERATION
If the main switch is set to “ON”, the starter
motor can only operate if at least one of the fol-
lowing conditio

Page 694 of 786

YAMAHA WR 450F 2006  Owners Manual 6 - 12
–+ELECELECTRIC STARTING SYSTEM
STARTER MOTOR
0
9
56
7
5 0 8
9
4
3
2
1
New
New
New
B
5
1
Extent of removal:
1 Starter motor disassembly
Extent of removal Order Part name Q’ty Remarks
STARTER

Page 708 of 786

YAMAHA WR 450F 2006  Owners Manual 6 - 18
–+ELECCHARGING SYSTEM
EC624000
COUPLERS AND LEADS CONNECTION 
INSPECTION
1. Check:
•Couplers and leads connection
Rust/dust/looseness/short-circuit → 
Repair or replace.
CHARGING VOLTAGE

Page 714 of 786

YAMAHA WR 450F 2006  Owners Manual 6 - 20
–+ELECTPS (THROTTLE POSITION SENSOR) SYSTEM
HANDLING NOTE
CAUTION:
Do not loosen the screws {TPS (throttle
position sensor)} 
1 except when changing
the TPS (throttle position sensor) due to

Page 718 of 786

YAMAHA WR 450F 2006  Owners Manual 6 - 22
–+ELECTPS (THROTTLE POSITION SENSOR) SYSTEM
4. Adjust:
•Idle speed
Refer to “IDLE SPEED ADJUSTMENT”
section in the CHAPTER 3. 
5. Insert the thin electric conductors 2 (lead)
into the T

Page 720 of 786

YAMAHA WR 450F 2006  Owners Manual 6 - 23
–+ELECTPS (THROTTLE POSITION SENSOR) SYSTEM
8. Tighten:
•Screw (TPS) 1 
9. Stop the engine.
1
EC694000
TPS INPUT VOLTAGE INSPECTION
1. Disconnect the TPS coupler.
2. Start the engine.
3. In

Page 726 of 786

YAMAHA WR 450F 2006  Owners Manual 6 - 25
–+ELECLIGHTING SYSTEM
AC MAGNETO INSPECTION
1. Inspect:
•Lighting coil resistance
Out of specification → Replace.
RECTIFIER/REGULATOR INSPECTION
1. Connect the battery leads.
2. Start the