Kymco MO BW 50 Service Manual - chap 13 (ruota freno sps ant)

13. STEERING HANDLEBAR/FRONT WHEEL/FRONT

BRAKE/FRONT SHOCK ABSORBER/FRONT FORK

13-0

BET & WIN 5 0

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STEERING HANDLEBAR/FRONT WHEEL/FRONT

BRAKE/FRONT SHOCK ABSORBER/FRONT FORK

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SERVICE INFORMATION -------------------------------------------- 13- 1 TROUBLESHOOTING ------------------------------------------------- 13- 2 STEERING HANDLEBAR--------------------------------------------- 13- 3 FRONT WHEEL--------------------------------------------------------- 13- 5 FRONT BRAKE --------------------------------------------------------- 13- 8 BRAKE CALIPER------------------------------------------------------- 13-11 FRONT SHOCK ABSORBER------------------------------------------ 13-14 FRONT FORK ----------------------------------------------------------- 13-18

13. STEERING HANDLEBAR/FRONT WHEEL/FRONT

BRAKE/FRONT SHOCK ABSORBER/FRONT FORK

13-1

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SERVICE INFORMATION

GENERAL INSTRUCTIONS

• Remove the motorcycle frame covers before removing the front wheel, steering handlebar, front

shock absorber and front fork. Jack the motorcycle front wheel off the ground and be careful to prevent the motorcycle from falling down.

• During servicing, keep oil or grease off the brake pads and brake disk.

SPECIFICATIONS

Item

Standard (mm)

Service Limit (mm)

Axle shaft runout



0.2

Radial2.0

Axial2.0

Front brake pad thickness

4.0

2.0

Front shock absorber spring free length

221.5

204.3

Brake disk thickness

3.8_ 4.2

3.0

Brake disk runout



0.30

Brake master cylinder I.D.

11.0_ 11.043

11.055

Brake master cylinder piston O.D.

10.957_ 10.970

10.945

Brake caliper piston O.D.

25.335_ 25.368

25.30

Brake caliper cylinder I.D.

25.400_ 25.45

25.485

TORQUE VALUES

Steering stem lock nut 78.4_ 117.6N-m Steering top cone race 4.9_ 12.74N-m Front shock absorber bolt 19.6_ 24.5N-m Front axle nut 44.1_ 49.0N-m Brake caliper bolt 24.5_ 34.3N-m

SPECIAL TOOLS

Lock nut wrench Front shock absorber compressor Ball race remover Driver handle Outer driver Bearing remover Bearing remover head, 12mm

Front wheel rim runout

13. STEERING HANDLEBAR/FRONT WHEEL/FRONT

BRAKE/FRONT SHOCK ABSORBER/FRONT FORK

13-2

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TROUBLESHOOTING

Hard steering (heavy) Front wheel wobbling

• Excessively tightened steering stem top • Bent rim cone race • Loose front axle

• Broken steering balls • Bent spoke plate

• Insufficient tire pressure • Faulty tire

Steers to one side or does not track straight • Improperly tightened axle nut

• Uneven front shock absorbers Soft front shock absorber

• Bent front fork • Weak shock springs

• Bent front axle or uneven tire • Insufficient damper oil

Poor brake performance Front shock absorber noise

• Worn brake pads • Slider bending

• Contaminated brake pad surface • Loose fork fasteners

• Deformed brake disk • Lack of lubrication

• Air in brake system

• Deteriorated brake fluid

• Worn brake master cylinder piston oil seal

• Clogged brake fluid line

• Unevenly worn brake caliper

13. STEERING HANDLEBAR/FRONT WHEEL/FRONT

BRAKE/FRONT SHOCK ABSORBER/FRONT FORK

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STEERING HANDLEBAR

REMOVAL

Remove the handlebar front and rear covers. (2-7) Remove the front brake master cylinder attaching bolts. Remove the front upper cover. (2-3) Remove the front lower cover. (2-3) Remove the leg shield. (2-4) Remove the floor board. (2-5)

Remove the four screws attaching the right and left handlebar switches. Disconnect the throttle cable from the throttle grip and remove the throttle grip from the handlebar.

Remove the handlebar lock nut and take out the bolt. Remove the handlebar.

Brake Master Cylinders

Screws

Bolts

Throttle Grip

Throttle Cable

Bolt

Lock Nut

13. STEERING HANDLEBAR/FRONT WHEEL/FRONT

BRAKE/FRONT SHOCK ABSORBER/FRONT FORK

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INSTALLATION

Install the handlebar onto the steering stem and install the handlebar lock nut and bolt. Tighten the bolt to the specified torque.

Torque: 39.2_ 49.0N-m

Lubricate the throttle grip front end with grease and then install the throttle grip. Connect the throttle cable to the throttle grip. Install the right and left handlebar switches and tighten the screws.

Install the front and rear brake master cylinders.

Throttle Grip

Throttle Cable

Bolt

Lock Nut

Brake Master Cylinder

• Adjust the throttle grip free play to the

specified range of 2_ 6mm.

°Ø

• Install the brake master cylinders by

aligning the index marks.

°Ø

13. STEERING HANDLEBAR/FRONT WHEEL/FRONT

BRAKE/FRONT SHOCK ABSORBER/FRONT FORK

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FRONT WHEEL

REMOVAL

Jack the motorcycle front wheel off the ground. Remove the front axle nut to pull out the axle. Remove the front wheel and the speedometer gear unit.

INSPECTION

AXLE RUNOUT Set the axle in V blocks and measure the

runout using a dial gauge. The actual runout is _ of the total indicator reading.

Service Limit: 0.2mm replace if over

WHEEL RIM

Check the wheel rim runout. Service Limits: Radial: 2.0mm replace if over Axial:2.0mm replace if over

Axle Nut

Speedometer Gear Unit

13. STEERING HANDLEBAR/FRONT WHEEL/FRONT

BRAKE/FRONT SHOCK ABSORBER/FRONT FORK

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FRONT WHEEL BEARING Remove the side collar and dust seal.

Turn the inner race of each bearing with your finger to see if they turn smoothly and quietly. Also check if the outer race fits tightly in the hub. Replace the bearings if the races do not turn smoothly, quietly, or if they fit loosely in the hub.

BEARING REPLACEMENT

Remove the front wheel bearings and distance collar.

Special Tools

Bearing Remover Bearing Remover Head, 12mm

Wheel Bearing

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