2002 Buell S3T: Maintenance 1-35
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IGNITION TIMING 1.19
INSPECTION
Check ignition timing:
● At every 5000 mile (8000 km) service interval use the
STATIC TIMING method.
● After each removal of the cam position sensor.
STATIC TIMING
1CAUTION
Always wear proper eye protection when drilling. Flying
debris may result in minor or moderate injury.
1. See Figure 1-45. Locate outer timer cover at bottom of
gearcase cover on right side of vehicle.
a. Drill off heads of outer timer cover rivets using a 1/8-
inch (3.175 mm) drill bit. Use a punch to tap rivet
shafts inboard through holes in outer timer cover.
Remove outer timer cover.
b. Remove two Phillips screws to free inner timer
cover. If necessary, tap remaining rivet shafts
through holes in inner timer cover.
c. Carefully check the gearcase cover timer bore for
any rivet fragments.
2. Remove seat and tail section to gain access to electronic
control module. See 2.33 TAIL SECTION.
3. Prepare vehicle for testing.
a. Remove the timing plug from the timing inspection
hole centered below the cylinders on the right side
of the crankcase.
b. Remove the spark plugs.
c. Jack up vehicle to allow rotation of the rear wheel.
d. Shift transmission into fifth gear.
4. Bring engine to top dead center (TDC).
a. Standing on left side of vehicle, slowly rotate rear
wheel in a counter-clockwise direction until front
intake valve opens and closes (as viewed through
spark plug holes).
b. See Figure 1-46. Rotate rear wheel until TDC mark
is centered in timing inspection hole.
5. See Figure 1-47. Attach test components.
a. Unplug gray connector [11] on electronic control
module.
b. Attach female gray connector on BREAKOUT BOX
(Part No. HD-42682) to electronic control module.
c. Attach male gray connector on BREAKOUT BOX to
wiring harness.
d. Connect red (+) lead on voltmeter to Pin 3 on gray
side of BREAKOUT BOX.
e. Connect black (-) lead on voltmeter to Pin 8 on gray
side of BREAKOUT BOX.
Figure 1-45. Timing Cover
Figure 1-46. Timing Marks
DDFI
b0637x7x
Bolt
Screw (2)
Inner
Screw (2)
Outer
Cover
Cover
Pop Rivet (2)
Timer
Cam
Position
Sensor
b0626x1x
Timing
Front Cylinder
Top Dead Center (TDC)
Inspection
Hole
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