Suzuki GSX-R1000 Service Manual page 303

FORK SPRING
Measure the fork spring free length.
If it is shorter than the service limit, replace it with a new one.
_ Front fork spring free length:
Service Limit: 225 mm (8.86 in)
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CHASSIS 8·17
Upper side
Lower side
DAMPER ROD
Move the inner rod by hand to examine it for smoothness.
If any defects are found, replace inner rod/damper rod (car-
tridge) with a new one.