Baja Motorsports AT250UT Operator's Manual - Manual (Page 21)

21 — English
MAINTENANCE
WARNING:
Before inspecting, cleaning, or servicing the ATV, shut off
engine, wait for all moving parts to stop, and disconnect
and properly ground the spark plug wire. Failure to follow
these instructions can result in serious personal injury or
property damage.
SPARK PLUG
Your ATV is equipped with a DR8EA spark plug. To deter-
mine if the standard spark plug is in good condition, check
the color of the plug’s center electrode insulator after vehicle
operation. A brown color indicates that the plug is correct. A
white or dark insulator indicates that the engine may need
adjustment or another plug type may be needed. Consult your
authorized dealer or Baja Motorsports if your plug insulator
is not a light brown color.
NOTE: This ATV uses a resistor-type spark plug to avoid
jamming electronic parts. Improper spark plug selection may
cause electronic interference with your ATV’s ignition system,
resulting in the vehicle performance problems. It could also
have an incorrect fit or heat range for your engine, which
could cause severe engine damage and void the warranty.
Use only recommended spark plugs: NGK DR8EA or suit-
able equivalent.
To install a spark plug, turn it in as far as possible with your
fingers, then tighten it with a wrench about 1/2 turn past
finger tight (if the spark plug is new) or 1/4 turn past finger
tight (if you are reinstalling the old spark plug). Be careful
not to cross-thread the spark plug, which could damage the
aluminum threads of the cylinder head.
To maintain a proper functioning spark plug, keep the plug
free of carbon. Remove carbon from the plug with a wire or
pin and adjust the gap to 0.024-0.028 in. (0.6-0.7 mm) for
good ignition. Use a thickness gauge to check the gap.
CAUTION:
Keep the spark plug hole covered while the spark plug
is removed so that dirt does not enter the open hole. Dirt
entering the spark plug hole in the cylinder could damage
engine parts that move.
CHARGING BATTERY
 Connect the red positive (+) cable of the charger to the
red positive (+) pole on the battery.
NOTE: The red positive (+) cable has a larger diameter
than the black negative (–) cable.
 Connect the black negative (–) cable of the charger to the
black negative (–) pole on the battery.
WARNING:
Always connect the red positive (+) cable first and then the
black negative (–) cable. Failure to do so could cause the
battery to explode, causing serious personal injury.
 Charge the battery for 5 to 10 hours.
BATTERY REPLACEMENT
WARNING:
Batteries contain sulfuric acid. Avoid contact with skin,
eyes, or clothing. Always wear eye protection with side
shields marked to comply with ANSI Z87.1, along with
rubber gloves when working with batteries. Have water
available in case acid comes in contact with eyes or skin.
Keep all children and bystanders away from the area
while this procedure is being performed. Failure to do so
could result in fluids entering your eyes, burns, and other
possible serious injuries.
POISON – CAUSES
SEVERE BURNS
Contains sulfuric acid. Avoid con-
tact with skin, eyes, or clothing.
To prevent accidents, rinse empty
container with water.
ANTIDOTE:
External – Flush with water
Internal – Call physician immediately. Drink large quantities
of water or milk. Follow with Milk of Magnesia, beaten eggs,
or vegetable oil.
Eyes – Flush with water for 15 minutes and get prompt medi-
cal attention.
NOTE: If you are unsure if you are qualified to perform this
operation, take the unit to an authorized service center.

Remove seat and set aside to gain access to battery
compartment.