Checking The Front And Rear Brake Pads; Inspecting The Brake Fluid Level; Drive Chain Slack Check - Yamaha YTZ250S 1986 Service Manual

Checking the Front and Rear Brake Pads
A wear indicator is attached to each brake pad
to facilitate disc brake pad checks. This in-
dicator permits a visual check without
disassembling the pads. To check, depress
the brake and inspect the wear indicator. If the
wear indicator is ALMOST in contact with the
disc plate, ask a Yamaha dealer to replace the
pads.
1. Wear indicator 2. Wear limit
Inspecting the Brake Fluid Level
Insufficient brake fluid may let air enter the
brake system, possibly causing the brakes to
become ineffective.
Before riding, check the brake fluid level and
replenish when necessary; observe these
precautions:
1. Use only the designated quality brake
fluid: otherwise, the rubber seals may
deteriorate, causing leakage and poor
brake performance.
Recommended brake fluids: DOT #
3
1. Lower level
2-11
1. Lower level
2. Refill with the same type of brake fluid;
mixing fluids may result in a harmful
chemical reaction and lead to poor
performance.
3. Be careful that water does not enter the
master cylinder when refilling. Water will
significantly lower the boiling point of
the fluid and may result in vapor lock.
4. Brake fluid may erode painted surfaces
or plastic parts. Always clean up spilled
fluid immediately.
5. Have a Yamaha dealer check the cause if
the brake fluid level goes down.
Drive Chain Slack Check
Inspect the drive chain with both tires touching
the gound. Check the slack at the position
shown in the photograph. The normal vertical
deflection is approximately 30 - 35 mm
(1.2-1.4 in). If the deflection exceeds 35 mm
(1.4 in), adjust the chain slack.
1. Deflection