ignition YAMAHA TTR90 2007 Owners Manual

INSTRUMENT AND CONTROL FUNCTIONS
3-1
3
EAU40340
Main switch [TT-R90E(W)]The main switch controls the ignition
system. The main switch positions are
described below.
EAU10630
ON
All electrical systems are supplied with
power, and the engine can be started.
The key cannot be removed.
EAU10660
OFF
All electrical systems are off. The key
can be removed.
EAU12346
Handlebar switches Left
Right [TT-R90E(W)]
EAU41890
Engine stop switch “/”
[TT-R90(W)]
Set this switch to “” before starting
the engine. Set this switch to “” to
stop the engine.
EAU12660
Engine stop switch “/”
[TT-R90E(W)]
Set this switch to “” before starting
the engine. Set this switch to “” to
stop the engine in case of an emergen-
cy, such as when the vehicle overturns
or when the throttle cable is stuck.
EAU12710
Start switch “” [TT-R90E(W)]
Push this switch to crank the engine
with the starter.CAUTION:
ECA10050
See page 5-2 for starting instruc-tions prior to starting the engine.
1. Engine stop switch “/”
1. Start switch “”
U3P281E0.book Page 1 Monday, April 17, 2006 11:26 AM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-30
6
WARNING
EWA10660
After adjusting the brake pedal free
play, check the operation of thebrake light.
EAU25850
Troubleshooting Although Yamaha motorcycles receive
a thorough inspection before shipment
from the factory, trouble may occur dur-
ing operation. Any problem in the fuel,
compression, or ignition systems, for
example, can cause poor starting and
loss of power.
The following troubleshooting chart
represents a quick and easy procedure
for checking these vital systems your-
self. However, should your motorcycle
require any repair, take it to a Yamaha
dealer, whose skilled technicians have
the necessary tools, experience, and
know-how to service the motorcycle
properly.
Use only genuine Yamaha replace-
ment parts. Imitation parts may look like
Yamaha parts, but they are often inferi-
or, have a shorter service life and can
lead to expensive repair bills.
U3P281E0.book Page 30 Monday, April 17, 2006 11:26 AM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-31
6
EAU25971
Troubleshooting chart [TT-R90(W)]
WARNING
EWA10840
Keep away open flames and do not smoke while checking or working on the fuel system.
Check the fuel level in
the fuel tank.1. Fuel
There is
enough fuel.
There is
no fuel.
Supply fuel.
Operate the kickstarter.2. Compression
There is compression.
There is
no compression.Check the ignition.
Have a Yamaha dealer
check the vehicle.
Remove the spark plug
and check the electrodes.3. Ignition
Wet
DryWipe off with a dry cloth and correct the
spark plug gap, or replace the spark plug.
Have a Yamaha dealer check the vehicle.The engine does not start.
Have a Yamaha dealer check the vehicle.
Open the throttle halfway and operate
the kickstarter.
Check the compression.
The engine does not start.
Check the compression.
U3P281E0.book Page 31 Monday, April 17, 2006 11:26 AM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-32
6
EAU25901
Troubleshooting chart [TT-R90E(W)]
WARNING
EWA10840
Keep away open flames and do not smoke while checking or working on the fuel system.
Check the fuel level in
the fuel tank.1. Fuel
There is enough fuel.
There is no fuel.
Check the compression.
Supply fuel.
The engine does not start.
Check the compression.
Operate the electric starter.2. Compression
There is compression.
There is no compression.
Check the ignition.
Have a Yamaha dealer
check the vehicle.
Remove the spark plug
and check the electrodes.3. Ignition
Wipe off with a dry cloth and correct the
spark plug gap, or replace the spark plug.
Have a Yamaha dealer check the vehicle.
The engine does not start.
Have a Yamaha dealer
check the vehicle.
The engine does not start.
Check the battery.
Operate the electric starter.4. Battery
The engine turns over
quickly.
The engine turns over
slowly.
The battery is good.Check the battery lead connections,
and charge the battery if necessary.
DryWet
Open the throttle halfway and operate
the electric starter.
U3P281E0.book Page 32 Monday, April 17, 2006 11:26 AM

SPECIFICATIONS
8-3
8
Front suspension:Type:
Telescopic fork
Spring/shock absorber type:
Coil spring/oil damper
Wheel travel:
110.0 mm (4.33 in)Rear suspension:Type:
Swingarm (monocross)
Spring/shock absorber type:
Coil spring/gas-oil damper
Wheel travel:
95.0 mm (3.74 in)Electrical system:Ignition system:
CDIBattery:Model:
TT-R90E GT4B-5
Voltage, capacity:
TT-R90E 12 V, 2.5 AhFuse:Fuse:
TT-R90E 10.0 A
U3P281E0.book Page 3 Monday, April 17, 2006 11:26 AM