Brakes; Chassis - APRILIA RS 125 Manual

RS 125
9.1.6.

BRAKES

Trouble
Loss of braking
Brakes squeal
Brake lever has exceed-
ing travel
Brake fluid leakage
9.1.7.

CHASSIS

Trouble
Hard steering
Handlebars shake
Front wheel wobbles
Front fork too soft
Front fork too stiff
Front fork is noisy
Rear wheel wobbles
Rear suspension too soft
Rear suspension too stiff
Rear suspension noisy
Symptom and possible causes
Brake hydraulic system leaking.
Brake pads worn.
Contact surfaces of brake pads contaminated with oil.
Brake discs worn.
Air in the hydraulic circuit.
Contact surfaces of brake pads vitrified.
Brake pads inverted.
Wheel hub bearing damaged.
Front or rear wheel spindle loose.
Brake pads worn.
Foreign matter suspended in brake fluid.
Return hole of master cylinder obstructed.
Air in the hydraulic circuit.
Brake fluid level low.
Brake fluid does not meet specification.
Fittings loose.
Hoses cracked.
Piston and/or body damaged.
Symptom and possible causes
Steering adjusting ring nut overtightened.
Steering bearing damaged.
Steering stem distorted.
Tyre underinflated.
Uneven front fork settings.
Front fork buckled.
Front wheel rim and/or tyre warped.
Wheel rim warped.
Front wheel hub bearings worn.
Tyre defective or does not meet specification.
Wheel spindle nut loose.
Front fork oil does not meet specification.
Springs yielded.
Front fork oil level low. .
Front fork oil does not meet specification (viscosity too high).
Front fork overfilled.
Front fork oil level low.
Suspension nuts loose.
Wheel rim warped.
Wheel hub bearings or swinging arm bearings worn.
Tyre defective or does not meet specification.
Swinging arm and shock absorber bearings worn.
Rear suspension bolts or nuts loose.
Shock absorber spring yielded.
Adjuster incorrectly set.
Perdita d'olio dall'ammortizzatore.
Adjuster incorrectly set.
Shock absorber pivot bolt distorted.
Swinging arm distorted. .
Swinging arm and shock absorber bearings worn.
Rear suspension bolts or nuts loose.
Swinging arm and shock absorber bearings worn.
TROUBLESHOOTING INFORMATION
Remedy
Repair or replace.
Replace.
Replace.
Replace.
Bleed the circuit.
Sand brake pad surfaces.
Install brake pads cor-
rectly.
Replace.
Tighten to the specified
torque.
Replace.
Change brake fluid.
Dismantle and clean
brake master cylinder.
Bleed the circuit.
Top up to specified level.
Bleed the circuit.
Change using specified
brake fluid.
Tighten to the specified
torque.
Replace.
Replace piston and/or
body.
Remedy
Adjust.
Replace.
Replace.
Adjust.
Adjust.
Replace.
Replace.
Replace.
Sostituire.
Replace.
Tighten.
Adjust.
Replace.
Top up
Replace.
Remove excess oil.
Top up.
Tighten.
Replace.
Replace.
Replace.
Replace.
Tighten.
Replace.
Adjust.
Sostituire.
Adjust.
Replace.
Replace.
Replace.
Tighten.
Replace.
9 - 7