Buell S1 Lightning User Manual

7-31
VOLTAGE REGULATOR
GENERAL
The voltage regulator is on the right side next to the battery.
The voltage regulator is not repairable. Replace the unit if it
fails.
REMOVAL
1
WARNING
To avoid accidental start-up of vehicle and possible per-
sonal injury, disconnect the battery cables before pro-
ceeding. Always disconnect the negative cable first. If
the positive cable should contact ground with the nega-
tive cable installed, the resulting sparks may cause a bat-
tery explosion producing personal injury.
1 CAUTION
Hold battery cable when loosening battery terminal hard-
ware. Failure to hold cable may cause battery damage.
1. Disconnect battery cables, negative cable first.
1 CAUTION
When disconnecting the alternator stator wiring, pull
apart the connector by firmly grasping both connector
halves. Do not pull on leads or damage to the wires and/
or terminals may result.
2. See Figure 7-29. Disconnect voltage regulator connector
[P17] from alternator stator wiring.
3. Disconnect charging wire (black) from gold terminal on
the main circuit breaker.
4. See Figure 7-30. Remove screws (1, 3), washers (2) and
lockwasher (5). Detach and remove groundstrap from
long screw (1).
5. Remove and discard voltage regulator (3).
INSTALLATION
1. See Figure 7-30. Install new voltage regulator with
longer screw (1) next to battery. Attach groundstrap
under voltage regulator mount.
2. Connect voltage regulator connector [P17] to alternator
stator wiring.
3. Route charging wire to gold post on main circuit breaker.
Attach wire to frame with new cable straps.
1
WARNING
Always connect positive battery cable first. If the positive
cable should contact ground with the negative cable
installed, the resulting sparks may cause a battery explo-
sion resulting in personal injury.
1 CAUTION
Hold battery cable when tightening battery terminal hard-
ware. Failure to hold cable may cause battery damage.
4. Connect battery cables, positive cable first.
5. Test charging system. See CHARGING SYSTEM on
page 7-23.
Figure 7-29. Voltage Regulator Connector [P17]
Figure 7-30. Voltage Regulator
b0227x7x



1
2
30A
MASTER
CIRCUIT
BREAKER
R
P17
BK
BK
BK
GN
VOLTAGE REGULATOR
BK
BK
BK
BK
STATOR
BATTERY
1. Screw (long)
2. Washer (2)
3. Screw (short)
4. Voltage regulator
5. Lockwasher
6. Charging wire
7. Connector [P17]
8. Cable-strap
b0072a7x
7
8
1
2
5
6
4
3

Buell S1 Lightning Specifications

General

Transmission	5-speed
Rear Brakes	Single 230mm disc, single-piston caliper
Compression Ratio	10.0:1
Ignition	Electronic
Engine Type	Air-cooled, four-stroke, 45° V-twin
Rear Suspension	Showa monoshock, adjustable preload, compression and rebound damping
Front Brakes	Single 340mm disc, 6-piston caliper
Seat Height	775 mm
Bore x Stroke	88.8 mm x 96.8 mm
Fuel System	Carburetor
Frame	Tubular steel
Tires	Front: 120/70 ZR17, Rear: 170/60 ZR17