Yamaha RS90NL Owner's Manual page 78

NOTE:
@
The rear suspension spring preload can be further
adjusted by changing the position of the spring seat.
Have a Yamaha dealer make this adjustment as it
requires special tools.
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WARNING
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Be sure to have a Yamaha dealer make this adjust-
ment.
This shock absorber contains highly pressurized
nitrogen gas. It could explode by improper handling,
causing injury or property damage.
G Do not tamper with or attempt to open the shock
absorber.
G
Do not subject the shock absorber to an open
flame or other high heat sources, which could
cause it to explode.
G Do not deform or damage the shock absorber in
any way.
G Do not dispose of a worn or damaged shock
absorber by yourself. Take the unit to a Yamaha
dealer.
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