Specifications - Yamaha 2011 YZ250FA Owner's Service Manual

CHECKING THE BRAKE FLUID LEVEL
1. Place the brake master cylinder so that its
top is in a horizontal position.
2. Inspect:
• Brake fluid level
Fluid at lower level → Fill up.
Recommended brake fluid:
DOT #4
• Use only designated quality brake fluid to
avoid poor brake performance.
• Refill with same type and brand of brake
fluid; mixing fluids could result in poor
brake performance.
• Be sure that water or other contaminants
do not enter master cylinder when refill-
ing.
• Clean up spilled fluid immediately to avoid
erosion of painted surfaces or plastic
parts.
a. Lower level
A. Front
B. Rear
CHECKING THE SPROCKET
1. Inspect:
• Sprocket teeth "a"
Excessive wear → Replace.
Replace the drive sprocket, rear wheel sprock-
et and drive chain as a set.
CHECKING THE DRIVE CHAIN
1. Measure:
• Drive chain length (15 links) "a"
Out of specification → Replace.
Drive chain length (15 links):
<Limit>: 242.9 mm (9.563 in)
• While measuring the drive chain length, push
down on the drive chain to increase its ten-
sion.
• Measure the length between drive chain roller
"1" and "16" as shown.
• Perform this measurement at two or three dif-
ferent places.
2. Remove:
• Master link clip
• Joint "1"
• Drive chain "2"
3-25
CHASSIS