Marzocchi QR20 Plus, Owner'S Manual

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Maintenance
M
Z
010
English
4
89
4 MAINTENANCE
4.1 Problems - Diagnosis - Solutions
This paragraph indicates some of the problems that may arise during the fork’s use, as well as the
possible causes of these problems and the suggested solutions.
Always check this table before working on the fork.
Table 8: IProblems - Diagnosis - Solutions
Problem Diagnosis Solution
Fork has too much
sag Spring rate too soft or fork oil too
fluid
Add spring preload by replacing
the preload tube
Check the oil height
Change to stiffer spring rate
Increase air pressure
Forks bottoms too
easily, but it has the
recommended sag
Not enough compression
damping Increase compression damping by
changing oil level
Fork bottoms too
easily; needs more
than maximum
preload to attain
proper sag
Spring rate too soft or fork oil too
fluid
Check oil height
Get stiffer springs
Increase air pressure
Fork does not get full
travel Spring rate too stiff or fork oil too
high
Check oil height
Get softer spring
Decrease air pressure
Fork extends too
quickly; harsh top-out
after impacts
Not enough rebound damping
Increase rebound damping
Replace oil (SAE 7,5) with a
higher viscosity
Fork gets easily to
travel end Not enough compression
damping Increase compression damping at
travel end via the proper adjuster
Front wheel wants to
tuck under while
cornering
Too much rebound damping;
spring rate too soft
Decrease the rebound damping
Increase spring rate
Fork “packs up” or
stays down in travel
during multiple
impacts
Too much rebound damping Decrease rebound damping
Knocking sound
during rebound, but
no harsh top-out
Too much rebound damping Decrease rebound damping
Operations to be carried out at MARZOCCHI authorized centres