Needle Bearing Migration - Cannondale LEFTY SPEED DLR2 Owner's Manual Supplement

Needle Bearing
Migration Reset
NOTE: Ideally, reset the bearings after 25
hours of normal riding or 10 hours of hard
riding/racing to maintain optimum fork
performance.
We recommend that the needle bearing
reset procedure should be performed by a
professional mechanic.
Explanation
Inside the fork the four needle bearing
cages (1) move independently up and down
between each inner (2) and outer race pair
(3). This bearing arrangement provides
numerous advantages to fork performance
but requires simple periodic maintenance to
ensure proper alignment.
Bearing Migration
If a cage or cages shifts out of alignment up
or down in relation to the others it is said to
have "migrated." This migrated condition
will limit travel.
Needle bearing migration is normal and
expected. However, if the fork is ridden in
this state for extended periods, the fork can
be damaged.
Evidence of migration is:
1 An unusual "top out" noise .If
an unusual noise is heard, the
extended fork length should be
measured to confirm the condition.
2. The fork's maximum extended
length is reduced.
If migration re-occurs frequently
(immediately after resetting), the cause
could be damage present in the inner or
outer races, ,bearings/cages or other fork
parts. Inspection and replacement of
damage parts will be required to correct a
persistent problem with bearing migration.
ALIGNED
20
MIGRATED