I.8
Part. N. 8000 B0148 (02-2008)
FRONT SUSPENSION
Problems - Possible causes - Solutions
This paragraph indicates some of the problems which may arise during the working life of the fork, as well as the possible causes of
these problems and any solutions to the same. Always consult this Table before working on the fork.
PROBLEM CAUSE SOLUTION
Oil leaking from the oil seal 1. Worn oil seal 1. Replace the oil seal
2. Scratched stanchion tube 2.
Replace the stanchion tube and the oil
seal
3. Dirty oil seal 3. Replace the oil seal, the dust seal
and the oil
Oil leaking from the bottom of the 1. Damaged bottom valve O- ring 1. Replace O- ring
fork leg
2. Bottom valve loose 2. Tighten bottom valve
Loss of sensitivity 1. Worn sliding bushings 1. Replace the sliding bushings
2. Old oil 2. Change the oil
Fork legs not sliding properly 1. Fork legs not aligned correctly 1. Loosen the wheel axle and align
the fork correctly (see Par. 4. 2)
The fork does not react to 1. The pin inside the rod is stuck 1. Clean or replace rod
adjustment variations 2. The adjustment screw is stuck 2. Take off and clean adjustment
screw
3. Impurities in the oil 3.
Change the oil making sure the
forks’ inside components are
properly cleaned
4. Valves are blocked with impurities 4.
Change the oil making sure the
forks’ inside components are
properly cleaned
Fork is too smooth with any 1. Oil level too low 1. Re- establish correct oil level
adjustment 2. Too soft or damaged spring 2. Replace the spring
3. Oil viscosity too low 3. Re- establish correct oil level
Fork is too stiff with any 1. Oil level too high 1. Re- establish correct oil level
adjustment 2. Oil viscosity too high 2. Replace the oil with a lower
viscosity one
3. Too hard spring 3. Replace the spring
General maintenance operations
Use
Intense Normal
Tout terrain Road Tout terrain Road
Check screws tightening up to required torque Check screws tightening up to
Clean the dust seal Before every ride Before every ride After every use After every use
Change the oil 6 hours 20 hours 30 hours 60 hours
Replace the sealing rings 6 hours 20 hours 30 hours 60 hours
If the fork is used on mudded or sandy grounds, the maintenance operations shall be carried out more frequently 30% .
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