Yamaha Rhino 450 YXR45FAV, Service Manual

Page: 87 / 413

3 - 11
CHK
ADJ
CHECKING THE IGNITION TIMING/
MEASURING THE COMPRESSION PRESSURE
5. Check:
• ignition timing
▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼▼▼
a. Warm up the engine and keep it at the
specified speed.
b. Remove the timing plug 1 .
c. Visually check the stationary pointer 2 to
verify it is within the required firing range 3
indicated on the rotor.
Incorrect firing range
→
Check the pulser
coil assembly.
d. Install the timing plug.
▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲▲▲
6. Install:
• engine cooling fan
7. Install:
• air shroud 1
8. Detach:
• timing light
• tachometer
9. Install:
• console
• passenger seat
• driver seat
Refer to “SEATS, ENCLOSURE, HOOD
AND CARGO BED” in chapter 8.
MEASURING THE COMPRESSION
PRESSURE
NOTE:
Insufficient compression pressure will result in
a loss of performance.
1. Check:
• valve clearance
Out of specification
→
Adjust.
Refer to “ADJUSTING THE VALVE
CLEARANCE”.
2. Start the engine and let it warm up for sev-
eral minutes.
3. Stop the engine.
Engine speed
1,450 ~ 1,550 r/min
1
2
3
T
R
.
.
9 Nm (0.9 m
·
kg, 6.5 ft
·
lb)
T
R
.
.
10 Nm (1.0 m
·
kg, 7.2 ft
·
lb)