Engine Overheats
1. Insuffi
cient air reaching the cylinders from slow
operation.
2. Insuffi
cient oil supply.
3. Engine computer malfunction.*
Engine Starts but Runs Irregularly or Misses
1. Battery low on charge.
2. Spark plugs in bad condition have improper gap or
are partially fouled.
3. Incorrect spark plugs.
4. Spark plug cables in bad condition and shorting.*
5. Damaged wire or loose connection causing an open
circuit.*
6. Damaged wire insulation causing short circuit.*
7. Fuel system clogged by water or dirt.*
8. Air fi lter clogged or dirty.
9. Fuel vent system plugged.*
Engine Starts Hard
1. Battery low on charge.
2. Spark plugs in bad condition, have improper gap, or
are partially fouled.*
3. Incorrect spark plugs.
4. Spark plug cables in bad condition and shorting.*
5. Loose wire or cable connection(s) at one of the
battery terminals or at coil.*
6. Fuel system or Powertrain computer malfunction.*
7. Improper engine oil.
8. Ignition system or Powertrain computer
malfunction.*
9. Air fi lter clogged or dirty.
10. Fuel tank vent plugged.*
11. Fuel system clogged by water or dirt.*
Engine Turns Over but Does Not Start
1. Fuel tank empty.
2. Fuel fi lter clogged or pressure pump not running. *
3. Discharged battery or loose battery terminal
connections.
4. Fouled spark plugs.
5. Engine fl ooded with fuel.
6. Spark plug cable connections loose or in bad
condition.*
7. Loose or corroded wire or cable connection(s).*
8. Inoperative fuel pump or blown fuse
Engine Vibrates Excessively or Seems to
Vibrate
1. Swingarm pivot shaft bolts loose.*
2. Front engine mount bolts loose.*
Troubleshooting
53
* Service that should be performed by a skilled technician using specialized tools and equipment.
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