Yamaha XMAX YP125R - Service manual > Front wheel

Removing the front wheel and brake disc

Disassembling the front wheel

Removing the front wheel

1. Stand the vehicle on a level surface.

WARNING

Securely support the vehicle so that there is no danger of it falling over.

TIP

Place the vehicle on a suitable stand so that the front wheel is elevated.

2. Remove:

• Front wheel

TIP

Do not apply the front brake lever when removing the front wheel.

Disassembling the front wheel

1. Remove:

• Oil seal
• Wheel bearings

a. Clean the surface of the front wheel hub.

b. Remove the oil seal "1" with a flat-head screwdriver.

TIP

To prevent damaging the wheel, place a rag "2" between the screwdriver and the wheel surface.

c. Remove the wheel bearings "3" with a general bearing puller.

Checking the front wheel

1. Check:

• Wheel axle

Roll the wheel axle on a flat surface.

Bends → Replace.

WARNING

Do not attempt to straighten a bent wheel axle.

2. Check:

• Tire
• Front wheel

Damage/wear → Replace.

Refer to "CHECKING THE TIRES" on page 3-39 and "CHECKING THE WHEELS"

3. Measure:

• Radial wheel runout "1"
• Lateral wheel runout "2"

Over the specified limits → Replace.

Radial wheel runout limit 1.0 mm (0.04 in)

Lateral wheel runout limit 0.5 mm (0.02 in)

4. Check:

• Wheel bearings

Front wheel turns roughly or is loose → Replace the wheel bearings.

• Oil seal

Damage/wear → Replace.

Assembling the front wheel

1. Install:

• Wheel bearings

a. Install the new wheel bearing (right side).

NOTICE

Do not contact the wheel bearing inner race "1" or balls "2". Contact should be made only with the outer race "3".

TIP

Use a socket "4" that matches the diameter of the wheel bearing outer race.

b. Install the spacer.

c. Install the new wheel bearing (left side).

TIP

Place a suitable washer "1" between the socket "2" and the bearing so that both the inner race "3" and outer race "4" are pressed at the same time, and then press the bearing until the inner race makes contact with the spacer "5".

Adjusting the front wheel static balance

TIP

• After replacing the tire, wheel or both, the front wheel static balance should be adjusted.
• Adjust the front wheel static balance with the brake disc installed.

1. Remove:

• Balancing weight(s)

2. Find:

• Front wheel's heavy spot

TIP

Place the front wheel on a suitable balancing stand.

a. Spin the front wheel.

b. When the front wheel stops, put an "X1" mark at the bottom of the wheel.

c. Turn the front wheel 90º so that the "X1" mark is positioned as shown.

d. Release the front wheel.

e. When the wheel stops, put an "X2" mark at the bottom of the wheel.

f. Repeat steps (c) through (e) several times until all the marks come to rest at the same spot.

g. The spot where all the marks come to rest is the front wheel's heavy spot "X".

3. Adjust:

• Front wheel static balance

a. Install a balancing weight "1" onto the rim exactly opposite the heavy spot "X".

TIP

Start with the lightest weight.

b. Turn the front wheel 90º so that the heavy spot is positioned as shown.

c. If the heavy spot does not stay in that position, install a heavier weight.

d. Repeat steps (b) and (c) until the front wheel is balanced.

4. Check:

• Front wheel static balance

a. Turn the front wheel and make sure it stays at each position shown.

b. If the front wheel does not remain stationary at all of the positions, rebalance it.

Installing the front wheel (front brake disc)

1. Install:

• Front brake disc

Front brake disc bolt 12 Nm (1.2 m*kgf, 8.7 ft*lbf) LOCTITE

TIP

• Install the brake disc so that the recessed portion of the bolt hole faces away from the hub.
• Tighten the brake disc bolts in stages and in a crisscross pattern.

2. Check:

• Front brake disc

Refer to "CHECKING THE FRONT BRAKE DISC"

3. Lubricate:

• Oil seal lips
• Speed sensor oil seal lip

Recommended lubricant Lithium-soap-based grease

4. Install:

• Spacer
• Speed sensor
• Front wheel

TIP

• Make sure that the speed sensor and the wheel hub are installed with the projection "a" of the wheel hub inserted in a slot "b" of the speed sensor.
• When installing the speed sensor, make sure that the projection on the wheel hub does not damage the lip of the speed sensor oil seal.
• Make sure that the slot "c" in the speed sensor fits over the stopper "d" on the outer tube.

5. Install:

• Wheel axle
• Wheel axle pinch bolt

Wheel axle 70 Nm (7.0 m*kgf, 50 ft*lbf)

Wheel axle pinch bolt 23 Nm (2.3 m*kgf, 17 ft*lbf)

NOTICE

Before tightening the wheel axle, push down hard on the handlebar several times and check if the front fork rebounds smoothly.

See also: