Check the brake lever free play. Be sure the brake is working properly.

U-641

AWA RIMING:

A soft or spongy feeling in the brake lever can indicate the presence of air in the brake system. This air must be removed by bleeding the brake system before the motorcycle is operated. Air in the system will cause greatly diminished braking capability and can result in loss of control and an accident. Have a Yamaha dealer in­spect and bleed the system if necessary.

6-21

H804

Rear brake adjustment

The brake pedal top end should be 15 mm (0.6 in) below the top of the footrest. If not, ask a Yamaha dealer to adjust it.

LJ-688

^WARNING:

An incorrect free play indicates a hazardous condition in the brake system. Do not operate the motorcycle until the failure in the brake system is corrected. Ask a Yamaha dealer for immediate repairs.

H833

Brake light switch adjustment

The brake light switch is operated by move­ment of the brake pedal. To adjust, hold the main body of the switch with your hand so it does not rotate and turn the adjusting nut. Proper adjustment is achieved when the brake light comes on just before the brake begins to take effect.

6-22

6-23

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. When checking the fluid level, make sure
the master cylinder top is horizontal by
turning the handlebars.

2. Use only the designated quality brake
fluid; otherwise, the rubber seals may de­
teriorate, causing leakage and poor brake
performance.

Recommended brake fluids: DOT #4 If DOT #4 is not available, #3 can be used.

1 Lower level

6-24

1 Lower level

3. Refill with the same type of brake fluid;
mixing fluids may result in a harmful
chemical reaction and lead to poor per­
formance.

4. 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.

5. Brake fluid may erode painted surfaces or
plastic parts. Always clean up spilled fluid
immediately.

6. Have a Yamaha dealer check the cause
if the brake fluid level goes down.

H835

Brake fluid replacement

1. Complete fluid replacement should be
done only by trained Yamaha service per­
sonnel.

2. Have a Yamaha dealer replace the follow­
ing components when indicated in the
schedule or when they are damaged or
leaking.

a. Replace all rubber seals every two years.

b. Replace all hoses every four years.

6-25

Clutch adjustment

This model has two clutch cable length ad­justers. The cable length adjusters are used to take up slack from cable stretch and to pro­vide sufficient free play for proper clutch oper­ation. Normally, once the clutch cable length adjuster (crankcase) is properly set, the only adjustment required is maintenance of free play at the clutch cable length adjuster (handlebar lever)

I005

Free play adjustment

The clutch should be adjusted to suit the rider's preference; but free play at the lever pivot should be 2-3 mm (0.08-0.12 in). Loosen either the handlebar lever adjuster lock nut or the cable length adjuster lock nut. Turn the ca­ble length adjuster either in or out until proper lever free play is achieved.

Clutch lever free play: 2-3 mm (0.08-0.12 in)

1 Lock nut 2 Adjuster a 2~3 mm (0 08-0 12 in)

1 Lock nut

6-26

Drive chain slack check

U-M8

NOTE: _______________

sition shown in the illustration. The normal ver­tical deflection is approximately 25-40 mm {1.0-1.6 in). If the deflection exceeds 40 mm {1.6 in) adjust the chain slack.

Before checking and/or adjusting the chain slack, rotate the rear wheel through several revolutions. Check the chain slack several times to find the point where the chain is the tight­est. Check and/or adjust the chain slack where the rear wheel is in this "tight chain" position.

To check the chain slack the motorcycle must stand vertically with both wheels on the ground and without a rider. Check the slack at the po-

a 25-40 mm (1 0-1 6 in)

6-27

1421

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