Yamaha XVS250 2001, Service Manual

Page: 73 / 332

3-14
CHECKING THE IGNITION TIMING
CHK
ADJ
NOTE:
NOTE:
EAS00062
CHECKING THE IGNITION TIMING
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. Remove:
S
timing plug 1
2. Install:
S
timing light 1
S
engine tachometer 2
(to the spark plug lead of cyl. #1)
Timing light
90890-03141
Engine tachometer
90890-03113
3. Check:
S
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.
Engine idling speed
1,200
X
1,400 r / min
b. Check that the mark
a
on the generator ro-
tor is within the firing range b on the genera-
tor cover.
Incorrect firing range
Check the ignition
system.
The ignition timing is not adjustable.
4. Install:
S
timing plug
1