engine YAMAHA YZF-R6 2001 User Guide

INSTRUMENT AND CONTROL FUNCTIONS
3-23
3
EAU03720
Ignition circuit cut-off system The ignition circuit cut-off system (com-
prising the sidestand switch, clutch
switch and neutral switch) has the fol-
lowing functions.l
It prevents starting when the trans-
mission is in gear and the side-
stand is up, but the clutch lever is
not pulled.
l
It prevents starting when the trans-
mission is in gear and the clutch
lever is pulled, but the sidestand is
still down.
l
It cuts the running engine when
the transmission is in gear and the
sidestand is moved down.
Periodically check the operation of the
ignition circuit cut-off system according
to the following procedure.
EW000045
WARNING
_ If a malfunction is noted, have a
Yamaha dealer check the system
before riding. _E_5mt.book Page 23 Monday, September 18, 2000 9:08 AM

INSTRUMENT AND CONTROL FUNCTIONS
3-24
3
CD-01E
With the engine turned off:
1. Move the sidestand down.
2. Make sure that the engine stop switch is set to “ ”.
3. Turn the key to “ON”.
4. Shift the transmission into the neutral position.
5. Push the start switch.
Does the engine start?
The neutral switch may be defective.
The motorcycle should not be ridden until
checked by a Yamaha dealer.
With the engine still running:
6. Move the sidestand up.
7. Keep the clutch lever pulled.
8. Shift the transmission into gear.
9. Move the sidestand down.
Does the engine stall?After the engine has stalled:
10. Move the sidestand up.
11. Keep the clutch lever pulled.
12. Push the start switch.
Does the engine start?
The sidestand switch may be defective.
The motorcycle should not be ridden until
checked by a Yamaha dealer.The clutch switch may be defective.
The motorcycle should not be ridden until
checked by a Yamaha dealer.
NO
NOTE:This check is most reliable if performed with
a warmed-up engine.
YESYES NO
The system is OK.
The motorcycle can be ridden.
YES NO
E_5mt.book Page 24 Monday, September 18, 2000 9:08 AM

4-1
4
EAU01114
4-PRE-OPERATION CHECKSThe condition of a vehicle is the owner’s responsibility. Vital components can start to deteriorate quickly and unexpectedly,
even if the vehicle remains unused (for example, as a result of exposure to the elements). Any damage, fluid leakage or loss
of tire air pressure could have serious consequences. Therefore, it is very important, in addition to a thorough visual inspec-
tion, to check the following points before each ride.
EAU03439
Pre-operation check list
CO-01E
ITEM CHECKS PAGE
Fuel• Check fuel level in fuel tank.
• Refuel if necessary.
• Check fuel line for leakage.3-11–3-12
Engine oil• Check oil level in engine.
• If necessary, add recommended oil to specified level.
• Check vehicle for oil leakage.6-10–6-13
Coolant• Check coolant level in reservoir.
• If necessary, add recommended coolant to specified level.
• Check cooling system for leakage.6-13–6-17
Front brake• Check operation.
• If soft or spongy, have Yamaha dealer bleed hydraulic system.
• Check fluid level in reservoir.
• If necessary, add recommended brake fluid to specified level.
• Check hydraulic system for leakage.6-28–6-30
Rear brake• Check operation.
• If soft or spongy, have Yamaha dealer bleed hydraulic system.
• Check fluid level in reservoir.
• If necessary, add recommended brake fluid to specified level.
• Check hydraulic system for leakage.6-27–6-30
Clutch• Check operation.
• Lubricate cable if necessary.
• Check lever free play.
• Adjust if necessary.6-25–6-26, 6-34
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PRE-OPERATION CHECKS
4-2
4
Throttle grip• Make sure that operation is smooth.
• Lubricate throttle grip, housing and cables if necessary.
• Check free play.
• If necessary, have Yamaha dealer make adjustment.6-21, 6-33
Control cables• Make sure that operation is smooth.
• Lubricate if necessary.6-33
Drive chain• Check chain slack.
• Adjust if necessary.
• Check chain condition.
• Lubricate if necessary.6-31–6-32
Wheels and tires• Check for damage.
• Check tire condition and tread depth.
• Check air pressure.
• Correct if necessary.6-22–6-25
Brake and shift pedals• Make sure that operation is smooth.
• Lubricate pedal pivoting points if necessary.6-34
Brake and clutch levers• Make sure that operation is smooth.
• Lubricate lever pivoting points if necessary.6-34
Sidestand• Make sure that operation is smooth.
• Lubricate pivot if necessary.6-34
Chassis fasteners• Make sure that all nuts, bolts and screws are properly tightened.
• Tighten if necessary.—
Instruments, lights, signals
and switches• Check operation.
• Correct if necessary.—
Engine stop switch• Check operation.3-8
Sidestand switch• Check operation of ignition circuit cut-off system.
• If system is defective, have Yamaha dealer check vehicle.3-22 ITEM CHECKS PAGE
E_5mt.book Page 2 Monday, September 18, 2000 9:08 AM

OPERATION AND IMPORTANT RIDING POINTS
5
Starting a cold engine ....................................................................... 5-1
Starting a warm engine ..................................................................... 5-2
Shifting .............................................................................................. 5-3
Tips for reducing fuel consumption ................................................... 5-3
Engine break-in ................................................................................. 5-4
Parking .............................................................................................. 5-4
E_5mt.book Page 1 Monday, September 18, 2000 9:08 AM

5-1
5
EAU00372
5-OPERATION AND IMPORTANT RIDING POINTS
EAU00373
WARNING
@ l
Become thoroughly familiar
with all operating controls and
their functions before riding.
Consult a Yamaha dealer re-
garding any control or function
that you do not thoroughly un-
derstand.
l
Never start the engine or oper-
ate it in a closed area for any
length of time. Exhaust fumes
are poisonous, and inhaling
them can cause loss of con-
sciousness and death within a
short time. Always make sure
that there is adequate
ventilation.
l
Before starting out, make sure
that the sidestand is up. If the
sidestand is not raised com-
pletely, it could contact the
ground and distract the opera-
tor, resulting in a possible loss
of control.
@
EAU01382*
Starting a cold engine In order for the ignition circuit cut-off
system to enable starting, one of the
following conditions must be met:l
The transmission is in the neutral
position.
l
The transmission is in gear with
the clutch lever pulled and the
sidestand up.
EW000054
WARNING
@ l
Before starting the engine,
check the function of the igni-
tion circuit cut-off system ac-
cording to the procedure
described on page 3-24.
l
Never ride with the sidestand
down.
@1. Turn the key to “ON” and make
sure that the engine stop switch is
set to “ ”.
ECA00005
CAUTION:@ The oil level/coolant temperature
warning light and fuel level warning
light should come on for a few sec-
onds, then go off. If a warning light
does not go off, see page 3-4 for the
corresponding warning light circuit
check. @2. Shift the transmission into the neu-
tral position.NOTE:@ When the transmission is in the neutral
position, the neutral indicator light
should be on, otherwise have a
Yamaha dealer check the electrical
circuit. @3. Turn the starter (choke) on and
completely close the throttle. (See
page 3-13 for starter (choke)
operation.)
4. Start the engine by pushing the
start switch.
E_5mt.book Page 1 Monday, September 18, 2000 9:08 AM

OPERATION AND IMPORTANT RIDING POINTS
5-2
5
NOTE:@ If the engine fails to start, release the
start switch, wait a few seconds, and
then try again. Each starting attempt
should be as short as possible to pre-
serve the battery. Do not crank the en-
gine more than 10 seconds on any one
attempt. @5. After starting the engine, move the
starter (choke) lever back halfway.
ECA00045
CAUTION:@ For maximum engine life, never ac-
celerate hard when the engine is
cold! @6. When the engine is warm, turn the
starter (choke) off.NOTE:@ The engine is warm when it responds
normally to the throttle with the starter
(choke) turned off. @
EAU01258
Starting a warm engine Follow the same procedure as for start-
ing a cold engine with the exception
that the starter (choke) is not required
when the engine is warm.
E_5mt.book Page 2 Monday, September 18, 2000 9:08 AM

OPERATION AND IMPORTANT RIDING POINTS
5-3
5
EAU00423
Shifting Shifting gears lets you control the
amount of engine power available for
starting off, accelerating, climbing hills,
etc.
The gear positions are shown in the
illustration.NOTE:@ To shift the transmission into the neu-
tral position, press the shift pedal down
repeatedly until it reaches the end of its
travel, and then slightly raise it. @
EC000048
CAUTION:@ l
Even with the transmission in
the neutral position, do not
coast for long periods of time
with the engine off, and do not
tow the motorcycle for long dis-
tances. The transmission is
properly lubricated only when
the engine is running. Inade-
quate lubrication may damage
the transmission.
l
Always use the clutch while
changing gears to avoid dam-
aging the engine, transmission,
and drive train, which are not
designed to withstand the
shock of forced shifting.
@
EAU00424
Tips for reducing fuel
consumption Fuel consumption depends largely on
your riding style. Consider the following
tips to reduce fuel consumption:l
Thoroughly warm up the engine.
l
Turn the starter (choke) off as
soon as possible.
l
Shift up swiftly, and avoid high en-
gine speeds during acceleration.
l
Do not rev the engine while shift-
ing down, and avoid high engine
speeds with no load on the engine.
l
Turn the engine off instead of let-
ting it idle for an extended length
of time (e.g., in traffic jams, at traf-
fic lights or at railroad crossings).
1. Shift pedal
N. Neutral positionE_5mt.book Page 3 Monday, September 18, 2000 9:08 AM

OPERATION AND IMPORTANT RIDING POINTS
5-4
5
EAU01128
Engine break-in There is never a more important period
in the life of your engine than the period
between 0 and 1,600 km. For this rea-
son, you should read the following ma-
terial carefully.
Since the engine is brand new, do not
put an excessive load on it for the first
1,600 km. The various parts in the en-
gine wear and polish themselves to the
correct operating clearances. During
this period, prolonged full-throttle oper-
ation or any condition that might result
in engine overheating must be avoided.
EAU01329*
0–1,000 km
Avoid prolonged operation above
5,000 r/min.
1,000–1,600 km
Avoid prolonged operation above
6,000 r/min.
EC000052*
CAUTION:@ After 1,000 km of operation, the en-
gine oil must be changed and the oil
filter cartridge replaced. @1,600 km and beyond
The vehicle can now be operated
normally.
EC000053
CAUTION:@ l
Keep the engine speed out of
the tachometer red zone.
l
If any engine trouble should oc-
cur during the engine break-in
period, immediately have a
Yamaha dealer check the
vehicle.
@
EAU00460
Parking When parking, stop the engine, and
then remove the key from the main
switch.
EW000058
WARNING
@ l
Since the engine and exhaust
system can become very hot,
park in a place where pedestri-
ans or children are not likely to
touch them.
l
Do not park on a slope or on
soft ground, otherwise the
motorcycle may overturn.
@
E_5mt.book Page 4 Monday, September 18, 2000 9:08 AM

6
PERIODIC MAINTENANCE AND MINOR REPAIR
Owner’s tool kit .................................................... 6-1
Periodic maintenance and lubrication chart ......... 6-3
Removing and installing cowlings and panels ..... 6-6
Cowlings A and B ................................................. 6-6
Checking the spark plugs .................................... 6-9
Engine oil and oil filter cartridge ........................ 6-10
Coolant .............................................................. 6-13
Checking the air filter element ........................... 6-17
Air intake duct .................................................... 6-20
Adjusting the carburetors ................................... 6-20
Adjusting the engine idling speed ...................... 6-21
Adjusting the throttle cable free play .................. 6-21
Adjusting the valve clearance ............................ 6-22
Tires ................................................................... 6-22
Wheels ............................................................... 6-25
Adjusting the clutch lever free play .................... 6-25
Adjusting the brake pedal position ..................... 6-27
Adjusting the rear brake light switch .................. 6-27
Checking the front and rear brake pads ............. 6-28
Checking the brake fluid level ............................ 6-29
Changing the brake fluid .................................... 6-30
Drive chain slack ................................................ 6-31Lubricating the drive chain ................................ 6-32
Checking and lubricating the cables ................. 6-33
Checking and lubricating the throttle
grip and cable ................................................. 6-33
Lubricating the brake pedal ............................... 6-34
Checking and lubricating the brake and
clutch levers .................................................... 6-34
Checking and lubricating the sidestand ............ 6-34
Lubricating the rear suspension ........................ 6-35
Checking the front fork ...................................... 6-35
Checking the steering ....................................... 6-36
Checking the wheel bearings ............................ 6-36
Battery ............................................................... 6-37
Replacing the fuses .......................................... 6-38
Replacing the headlight bulb ............................. 6-39
Tail/brake light ................................................... 6-40
Replacing a turn signal light bulb ...................... 6-40
Supporting the motorcycle ................................ 6-41
Front wheel ....................................................... 6-41
Rear wheel ........................................................ 6-43
Troubleshooting ................................................. 6-44
Troubleshooting charts ...................................... 6-45
E_5mt.book Page 1 Monday, September 18, 2000 9:08 AM