Exup System - Yamaha MidnightStar XV1900A Owner's Manual

INSTRUMENT AND CONTROL FUNCTIONS
Spring preload:
Minimum (soft):
Distance A = 171 mm (6.73 in)
Standard:
Distance A = 171 mm (6.73 in)
Maximum (hard):
Distance A = 162 mm (6.38 in)
3. Tighten the locknut to the specified
3
torque. NOTICE: Always tighten
the locknut against the adjust-
ing nut, and then tighten the
locknut to the specified torque.
[ECA10121]
Tightening torque:
Locknut:
30 Nm (3.0 m·kgf, 22 ft·lbf)
WARNING
This shock absorber assembly con-
tains highly pressurized nitrogen
gas. Read and understand the fol-
lowing information before handling
the shock absorber assembly.
●
Do not tamper with or attempt to
open the cylinder assembly.
●
Do not subject the shock ab-
sorber assembly to an open
flame or other high heat source.
This may cause the unit to ex-
plode due to excessive gas
pressure.
●
Do not deform or damage the
cylinder in any way. Cylinder
damage will result in poor
damping performance.
●
Do not dispose of a damaged or
worn-out shock absorber as-
sembly yourself. Take the shock
absorber assembly to a Yamaha
dealer for any service.
EWA10221

EXUP system

This model is equipped with Yamaha's
EXUP (EXhaust Ultimate Power valve)
system. This system boosts engine
power by means of a valve that regu-
lates the inner diameter of the exhaust
pipe. The EXUP system valve is con-
stantly adjusted in accordance with the
engine speed by a computer-controlled
servomotor.
NOTICE
3-19
● The EXUP system has been set
and extensively tested at the
Yamaha factory.
these settings without sufficient
technical knowledge may result
in poor performance of or dam-
age to the engine.
● If the EXUP system cannot be
heard when the main switch is
turned on, have a Yamaha deal-
er check it.
EAU15282
ECA10191
Changing