ENGINE (YP250R)
3-25
IP
Before installing the spark plug, clean the spark
plug and gasket surface.
8. Connect:
• Spark plug cap
EAS20700
CHECKING THE IGNITION TIMING
IP
Prior to checking the ignition timing, check the
wiring connections of the entire ignition system.
Make sure that all connections are tight and free
of corrosion.
1. Stand the vehicle on a level surface.
IP
Place the vehicle on the centerstand.
2. Remove:
• Timing mark accessing plug “1”
3. Connect:
• Timing light “1”
(onto the spark plug lead)
4. Check:
• Ignition timing
▼▼▼▼▼▼▼▼▼ ▼ ▼▼▼▼ ▼ ▼▼▼▼ ▼ ▼▼▼▼ ▼ ▼▼▼▼ ▼▼▼
a. Start the engine, warm it up for several min-
utes, and then let it run at the specified en-
gine idling speed.
b. Check that the stationary pointer “a” on the
generator cover is within the firing range “b”
on the generator rotor.
Incorrect firing range → Check the ignition
system.
IP
The ignition timing is not adjustable.
▲▲▲▲▲▲▲▲▲ ▲ ▲▲▲▲ ▲ ▲▲▲▲ ▲ ▲▲▲▲ ▲ ▲▲▲▲ ▲▲▲
5. Disconnect:
• Timing light
6. Install:
• Timing mark accessing plug
(along with the O-ring )
EAS20710
MEASURING THE COMPRESSION
PRESSURE
IP
Insufficient compression pressure will result in a
loss of performance.
1. Remove:
• Storage box
Refer to “GENERAL CHASSIS” on page 4-1.
2. Measure:
• Valve clearance
Out of specification → Adjust.
Refer to “ADJUSTING THE VALVE CLEAR-
ANCE” on page 3-21.
T
R
.
.
Spark plug
18 Nm (1.8 m·kgf, 13 ft·lbf)
Timing light
90890-03141
Inductive clamp timing light
YU-03141
1
1
Engine idling speed
1450–1650 r/min
T
R
.
.
Timing mark accessing plug
8 Nm (0.8 m·kgf, 5.8 ft·lbf)
New
To Next Page
Loading...
Need help?
General
