Road test the vehicle on an unmade road or one with a large number of bends to identify the type of noise:

Unspecified noise: Move onto step 1

Move onto step 1

Move onto step 4

Move onto step 6

Check the front suspension components for any signs of rubbing:

• between the suspension arm bushes and washers
• between the dust cover and the shock absorber
• between the end of travel buffer and the housing

Move onto step 2

• Lubricate or replace the components involved (see Subassembly 4410A)

End of diagnosis

Check the condition of the anti-roll bar flexible mountings and that they are correctly tightened

Move onto step 3

• Restore the tightenings, lubricate, or replace the mountings Op. 4410C10

End of diagnosis

Check that the pipes and shields are correctly positioned and fixed in the engine compartment

Move onto step 7

• Suitably tighten the pipes or shields involved

End of diagnosis

Check for any friction between the shock absorber stem and the seal

Move onto step 5

• Lubricate or replace the shock absorber Op. 4410A12

End of diagnosis

Check the operation of the front wheel hub bearing

Move onto step 7

• Replace the wheel hub bearing Op. 4450C32

End of diagnosis

Check the condition of the bushes and mountings and that they are correctly tightened In the order:

• front selector fork flexible supports
• track control arm ball joints
• shock absorber attachment mounting

Move onto step 7

• Replace the supports (see Assembly 4410B)

End of diagnosis

• Replace the supports (see Assembly 4410A)

End of diagnosis

• Replace the mounting Op. 4410A12

End of diagnosis

Check that the fault is no longer present

End of diagnosis

Incorrect selection of diagnostic procedure