Page 34 of 88
INSTRUMENT AND CONTROL FUNCTIONS
3-19
33. Tighten the locknut to the specified
torque. NOTICE: Always tighten
the locknut against the adjust-
ing nut, and then tighten the
locknut to the specified torque.
[ECA10121]WARNING
EWA10221
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.
EAU15282
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
ECA10191
●
The EXUP system has been set
and extensively tested at the
Yamaha factory. Changing 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.
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)
Tightening torque: Locknut:
30 Nm (3.0 m·kgf, 22 ft·lbf)
U1CRE1E0.book Page 19 Monday, October 3, 2011 8:45 AM
Page 46 of 88
PERIODIC MAINTENANCE AND ADJUSTMENT
6-2
6
EAU17361
Owner’s tool kit The owner’s tool kit is located under the
rider seat. (See page 3-16.)
The service information included in this
manual and the tools provided in the
owner’s tool kit are intended to assist
you in the performance of preventive
maintenance and minor repairs. How-
ever, additional tools such as a torque
wrench may be necessary to perform
certain maintenance work correctly.TIPIf you do not have the tools or experi-
ence required for a particular job, have
a Yamaha dealer perform it for you.1. Owner’s tool kitU1CRE1E0.book Page 2 Monday, October 3, 2011 8:45 AM
Page 52 of 88
PERIODIC MAINTENANCE AND ADJUSTMENT
6-8
6
EAU19642
Checking the spark plugs The spark plugs are important engine
components, which should be checked
periodically, preferably by a Yamaha
dealer. Since heat and deposits will
cause any spark plug to slowly erode,
they should be removed and checked
in accordance with the periodic mainte-
nance and lubrication chart. In addition,
the condition of the spark plugs can re-
veal the condition of the engine.
The porcelain insulator around the cen-
ter electrode of each spark plug should
be a medium-to-light tan (the ideal color
when the vehicle is ridden normally),
and all spark plugs installed in the en-
gine should have the same color. If any
spark plug shows a distinctly different
color, the engine could be operating im-
properly. Do not attempt to diagnose
such problems yourself. Instead, have
a Yamaha dealer check the vehicle.
If a spark plug shows signs of electrode
erosion and excessive carbon or other
deposits, it should be replaced.Before installing a spark plug, the spark
plug gap should be measured with a
wire thickness gauge and, if necessary,
adjusted to specification.
Clean the surface of the spark plug
gasket and its mating surface, and then
wipe off any grime from the spark plug
threads.
TIPIf a torque wrench is not available when
installing a spark plug, a good estimate
of the correct torque is 1/4–1/2 turn
past finger tight. However, the spark
plug should be tightened to the speci-
fied torque as soon as possible.
Specified spark plug:
NGK/DPR8EA-9
DENSO/X24EPR-U91. Spark plug gapSpark plug gap:0.8–0.9 mm (0.031–0.035 in)
Tightening torque:
Spark plug: 18 Nm (1.8 m·kgf, 13 ft·lbf)
U1CRE1E0.book Page 8 Mond ay, October 3, 2011 8:45 AM
Page 55 of 88
PERIODIC MAINTENANCE AND ADJUSTMENT
6-11
6
TIPMake sure that the O-ring is properly
seated.10. Install the new oil filter cartridgewith an oil filter wrench, and then
tighten it to the specified torque
with a torque wrench. 11. Install the engine oil drain bolts
and their new gasket, and then
tighten the bolts to the specified
torques. 12. Pour only 2.5 L (2.6 US qt,
2.2 Imp.qt) of the specified amount
of recommended engine oil
through the filler hole, insert the
dipstick, and then ti ghten the oil fill-
er cap.
13. Start the engine, rev it several times, and then turn it off.
14. Remove the engine oil filler cap, and then gradually fill the oil tank
with the remaining oil quantity
while regularly checking the oil lev-
el on the dipstick.
TIPBe sure to wipe off spilled oil on any
parts after the engine and exhaust sys-
tem have cooled down.
1. O-ring
1. Oil filter cartridge
2. Torque wrench
Tightening torque:Oil filter cartridge:17 Nm (1.7 m·kgf, 12 ft·lbf)
Tightening torques: Engine oil drain bolt A (crankcase):32 Nm (3.2 m·kgf, 23 ft·lbf)
Engine oil drain bolt B (crankcase): 32 Nm (3.2 m·kgf, 23 ft·lbf)
Engine oil drain bolt (oil tank): 43 Nm (4.3 m·kgf, 31 ft·lbf)
Recommended engine oil:
See page 8-1.
Oil quantity: Without oil filter cartridge replace-
ment:
4.10 L (4.33 US qt, 3.61 Imp.qt)
With oil filter cartridge replacement:
4.90 L (5.18 US qt, 4.31 Imp.qt)
U1CRE1E0.book Page 11 Monday, October 3, 2011 8:45 AM
