2005 YAMAHA WR 450F ad blue

6 - 11
–+ELECELECTRIC STARTING SYSTEM
DIODE INSPECTION
1. Remove the diode from wire harness.
2. Inspect:
Diode continuity
Use pocket tester (tester selection posi-
tion Ω × 1)
Incorrect continuity → Replace. Tester (+)
→
Blue/Red terminal
1
Tester (–)
→
Sky blue terminal
2Continuous
Tester (+)
→
Blue/Red terminal
1
Tester (–)
→
Blue/Yellow terminal
3Continuous
Tester (+)
→
Sky blue terminal
2
Tester (–)
→
Blue/Red terminal
1No continuous
Tester (+)
→
Blue/Yellow terminal
3
Tester (–)
→
Blue/Red terminal
1No continuous
23
1
START SWITCH INSPECTION
1. Inspect:
Start switch continuity
No continuous while being pushed → Replace.
Continuous while being freed → Replace.
2. Inspect:
Rubber part a
Tears/damage → Replace. Tester (+) lead → Black lead 1
Tester (–) lead → Black lead 2
B
1 B
2 Tester selec-
tor position
PUSH IN
Ω ×
×× × 1
FREE
a

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
failure because it will cause a drop in
engine performance.
1
EC624000
COUPLERS AND LEADS CONNECTION
INSPECTION
1. Check:
Couplers and leads connection
Rust/dust/looseness/short-circuit →
Repair or replace.
TPS COIL INSPECTION
1. Inspect:
TPS coil resistance
Out of specification → Replace.
2. Loosen:
Throttle stop screw 1
NOTE:
Turn out the throttle stop screw until the throt-
tle shaft is in the full close position.Tester (+) lead
→ Blue lead
1
Tester (–) lead
→ Black lead
2
TPS coil
resistanceTester selector
position
4 ~ 6 kΩ at
20 °C (68 °F)kΩ × 1

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. Inspect:
TPS input voltage
Out of specification → Replace the CDI
unit.
Tester (+) lead
→ Blue lead
1
Tester (–) lead
→ Black/Blue lead
2
TPS input
voltageTester selector
position
4 ~ 6 V DCV-20

7 - 18
TUNSETTING
EC72Q000
Rear shock absorber setting parts
Rear shock spring 1
* For EUROPE
** For AUS, NZ and ZA
NOTE:
The I.D. color a is marked at the end of the
spring.
TYPESPRING
RATESPRING
PART NUMBERI.D.
COLOR/
POINTSPRING
FREE
LENGTH
SOFT4.3
4.5
4.75UN-22212-00
5UN-22212-10
5UN-22212-20Brown/1
Green/1
Red/1260
260
260
*STD 4.9 5UN-22212-30 Black/1 260
5.1 5UN-22212-40 Blue/1 260
STD 5.3 5UN-22212-50 Yellow/1 260
**STD 5.5 5UN-22212-60 Pink/1 260
STIFF 5.7 5UN-22212-70 White/1 260
Extent of adjustment (spring length)
SPRING FREE
LENGTHEXTENT OF
ADJUSTMENT
b
260 mm (10.24 in)237.5 ~ 258.5 mm
(9.35 ~ 10.18 in)