Aprilia RS-series RS 125 3, 1998-2005: Chassis troubleshooting information (Information for owner: Troubleshooting)

Trouble	Symptom and possible causes	Remedy
Hard steering	Steering adjusting ring nut overtightened.	Adjust.
	Steering bearing damaged.	Replace.
	Steering stem distorted.	Replace.
	Tyre underinflated.	Adjust.
Handlebars shake	Uneven front fork settings.	Adjust.
	Front fork buckled.	Replace.
	Front wheel rim and/or tyre warped.	Replace.
Front wheel wobbles	Wheel rim warped.	Replace.
	Front wheel hub bearings worn.	Sostituire.
	Tyre defective or does not meet specification.	Replace.
	Wheel spindle nut loose.	Tighten.
	Front fork oil does not meet specification.	Adjust.
Front fork too soft	Springs yielded.	Replace.
Front fork too soft	Front fork oil level low.	Top up
Front fork too stiff	Front fork oil does not meet specification (viscosity too high).	Replace.
Front fork too stiff	Front fork overfilled.	Remove excess oil.
Front fork is noisy	Front fork oil level low.	Top up.
Front fork is noisy	Suspension nuts loose.	Tighten.
Rear wheel wobbles	Wheel rim warped.	Replace.
	Wheel hub bearings or swinging arm bearings worn.	Replace.
	Tyre defective or does not meet specification.	Replace.
	Swinging arm and shock absorber bearings worn.	Replace.
	Rear suspension bolts or nuts loose.	Tighten.
Rear suspension too soft	Shock absorber spring yielded.	Replace.
	Adjuster incorrectly set.	Adjust.
	Perdita d'olio dall'ammortizzatore.	Sostituire.
Rear suspension too stiff	Adjuster incorrectly set.	Adjust.
	Shock absorber pivot bolt distorted.	Replace.
	Swinging arm distorted.	Replace.
	Swinging arm and shock absorber bearings worn.	Replace.
Rear suspension noisy	Rear suspension bolts or nuts loose.	Tighten.
Rear suspension noisy	Swinging arm and shock absorber bearings worn.	Replace.

Chassis troubleshooting information (Aprilia RS125)