Baja Motorsports DR150 Operator's Manual - Manuel (Page 14)

14 — English © 2010 Baja, Inc. All Rights Reserved.
MAINTENANCE
WARNING:
Before inspecting, cleaning, or servicing the dirt bike,
shut off engine, wait for all moving parts to stop, ensure
engine switch is in the OFF position, and disconnect the
spark plug wire. Properly ground or move spark plug
wire completely away from spark plug opening. Failure
to follow these instructions can result in serious personal
injury or property damage.
SPARK PLUG
Your dirt bike is equipped with an C7HSA spark plug. To
determine 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 dirt bike uses a resistor-type spark plug to avoid
jamming electronic parts. Improper spark plug selection may
cause electronic interference with your dirt bike’s ignition sys-
tem, 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: C7HSA or 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.
CHANGING/ADDING ENGINE LUBRICANT
Engine lubricant has a major influence on engine perfor-
mance and service life. Engine lubricant level should be
checked before each use of the dirt bike.
For best engine performance, change the lubricant every 20
to 40 hours of operation. In dirty and dusty areas, the lubricant
should be changed more often.
Reference the chart below for the appropriate engine lubricant
to use based on the temperature range in your area.
NOTE: In very cold weather [below 5°F (15°C)], use
SAE10W-50 for good starting and smooth operation.
ENGINE
LUBRICANT
°C -30 -20 -10 0 10 20 30 40
TEMP.
°F -22 -4 14 32 50 68 86 104
Always use a 4-stroke motor lubricant that meets or exceeds
the requirements for API service classification SJ. Check
lubricant level before each use.
NOTE: Non-detergent or 2-stroke engine lubricants will dam-
age the engine and should not be used.
To check lubricant level:

Park vehicle on level ground.
 Unscrew the oil cap/dipstick and remove.
 Wipe dipstick clean and re-seat in hole, but do not re-
thread.
SAE 10W-30
SAE 20W-40
SAE 10W-50
SAE 15W-40