Page 32 of 88
INSTRUMENT AND CONTROL FUNCTIONS
3-18
3With each complete turn of the ad-
justing nut, distance A is changed
by 2.0 mm (0.08 in).
3. Tighten the locknut to the specified
torque.
CAUTION:
ECA10120
Always tighten the locknut against
the adjusting nut, and then tightenthe locknut to the specified torque.
WARNING
EWA10220
This shock absorber contains highly
pressurized nitrogen gas. For prop-
er handling, read and understand
the following information before
handling the shock absorber. The
manufacturer cannot be held re-
sponsible for property damage or
personal injury that may result from
improper handling.
Do not tamper with or attempt to
open the gas cylinder.
Do not subject the shock ab-
sorber to an open flame or other
high heat sources, otherwise it
may explode due to excessive
gas pressure.
Do not deform or damage the
gas cylinder in any way, as this
will result in poor damping per-
formance.
Always have a Yamaha dealerservice the shock absorber.
1. Distance ASpring preload:
Minimum (hard):
Distance A = 162 mm (6.38 in)
Standard:
Distance A = 171 mm (6.73 in)
Maximum (soft):
Distance A = 171 mm (6.73 in)
Tightening torque:
Locknut:
30 Nm (3.0 m·kgf, 22 ft·lbf)
U5C4E2E0.book Page 18 Friday, September 7, 2007 4:17 PM
Page 44 of 88
PERIODIC MAINTENANCE AND MINOR REPAIR
6-1
6
EAU17240
Safety is an obligation of the owner. Pe-
riodic inspection, adjustment and lubri-
cation will keep your vehicle in the
safest and most efficient condition pos-
sible. The most important points of in-
spection, adjustment, and lubrication
are explained on the following pages.
The intervals given in the periodic
maintenance and lubrication chart
should be simply considered as a gen-
eral guide under normal riding condi-
tions. However, DEPENDING ON THE
WEATHER, TERRAIN, GEOGRAPHI-
CAL LOCATION, AND INDIVIDUAL
USE, THE MAINTENANCE INTER-
VALS MAY NEED TO BE SHORT-
ENED.
WARNING
EWA10320
If you are not familiar with mainte-
nance work, have a Yamaha dealerdo it for you.
EAU17360
Owner’s tool kit The owner’s tool kit is located under the
rider seat. (See page 3-15.)
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.NOTE:If you do not have the tools or experi-
ence required for a particular job, havea Yamaha dealer perform it for you.
WARNING
EWA10350
Modifications not approved by
Yamaha may cause loss of perfor-
mance and render the vehicle un-
safe for use. Consult a Yamaha
dealer before attempting any chang-es.
1. Owner’s tool kit
U5C4E2E0.book Page 1 Friday, September 7, 2007 4:17 PM
Page 49 of 88
PERIODIC MAINTENANCE AND MINOR REPAIR
6-6
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.
NOTE:
If 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-U9
1. Spark plug gap
Spark plug gap:
0.8–0.9 mm (0.031–0.035 in)
Tightening torque:
Spark plug:
17.5 Nm (1.75 m·kgf, 12.7 ft·lbf)
U5C4E2E0.book Page 6 Friday, September 7, 2007 4:17 PM
Page 52 of 88
PERIODIC MAINTENANCE AND MINOR REPAIR
6-9
6
NOTE:
Make sure that the O-ring is properlyseated.
10. Install the new oil filter cartridge
with an oil filter wrench, and then
tighten it to the specified torque
with a torque wrench.11. Install the engine oil drain bolts,
and then tighten them to the spec-
ified 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 tighten the oil filler 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.
NOTE:Be 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 wrenchTightening torque:
Oil filter cartridge:
17 Nm (1.7 m·kgf, 12 ft·lbf)
Tightening torques:
Engine oil drain bolt A (crankcase):
43 Nm (4.3 m·kgf, 31 ft·lbf)
Engine oil drain bolt B (crankcase):
43 Nm (4.3 m·kgf, 31 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)
U5C4E2E0.book Page 9 Friday, September 7, 2007 4:17 PM