Electrical System; Fuel System - Buell X1 2002 Service Manual

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Spark Plug Fouls Repeatedly
1. Incorrect spark plug.
2. Piston rings badly worn or broken.
3. Fuel mixture too rich for conditions.
4. Valve stem seals worn or damaged.
5. Valve guides badly worn.
Pre-Ignition or Detonation
(Knocks or Pings)
1. Excessive carbon deposit on piston head or combustion
chamber.
2. Incorrect heat range spark plug.
3. Spark plugs not firing.
4. Ignition timing advanced.
5. Fuel octane rating too low.
6. Intake manifold vacuum leak.
Overheating
1. Insufficient oil supply or oil not circulating.
2. Leaking valves.
3. Heavy carbon deposit.
4. Ignition timing retarded.
Valve Train Noise
1. Hydraulic lifter not functioning properly.
2. Bent push rod.
3. Cam, cam gears or cam bushings worn.
4. Rocker arm binding on shaft.
5. Valve sticking in guide.
Excessive Vibration
1. Engine tie-bars loose, broken or improperly spaced.
2. Lower mounting bolts loose.
3. Broken frame.
4. Primary chain badly worn or links tight as a result of
insufficient lubrication.
5. Wheels not aligned and/or tires worn.
6. Internal engine problem.
ENGINE LUBRICATION
SYSTEM
Oil Does Not Return To Oil Tank
1. Oil tank empty.
2. Return pump gears damaged.
3. Oil feed pump not functioning.
4. Restricted oil lines or fittings.
Engine Uses Too Much Oil or
Smokes Excessively
1. Piston rings badly worn or broken.
2. Valve stem seals worn or damaged.
3. Valve guides worn.
2002 Buell X1: Maintenance
Engine Leaks Oil From Cases, Push Rods,
Hoses
1. Loose parts.
2. Imperfect seal at gaskets, push rod cover, washers, etc.
To aid locating leaks, use BLACK LIGHT LEAK DETEC-
TOR (Part No. HD-35457).
3. Restricted oil return line to tank.
4. Restricted breather passage(s) to air cleaner.

ELECTRICAL SYSTEM

Alternator Does Not Charge
1. Regulator-rectifier module not functioning.
2. Rectifier not grounded.
3. Engine ground wire loose or broken.
4. Loose or broken wires in charging circuit.
5. Stator not functioning.
6. Rotor not functioning.
Alternator Charge Rate Is Below Normal
1. Regulator-rectifier module not functioning.
2. Stator not functioning.
3. Rotor not functioning.
4. Weak battery.
5. Loose connections.

FUEL SYSTEM

Fuel System Floods
1. Excessive "pumping" of throttle control grip.
2. Inlet valve sticking.
3. Inlet valve and/or valve seat worn or damaged.
4. Dirt or other foreign matter between valve and its seat.
Poor Fuel Economy
1. O2 sensor damaged or malfunctioning (bike running
rich). See dealer.
TRANSMISSION
Shifts Hard
1. Clutch dragging slightly.
2. Shifter forks (inside transmission) damaged.
3. Corners worn off shifter clutch dogs (inside transmis-
sion).
Jumps Out of Gear
1. Shifter pawl improperly adjusted.
2. Shifter engaging parts (inside transmission) badly worn
and rounded.
3. Shifter forks bent.
4. Damaged gears.
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