2004 YAMAHA TTR90 transmission

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Page 12 of 364

YAMAHA TTR90 2004  Owners Manual  
6. When going for riding, be sure to be with
your family.
Never go alone. 
7. Before riding the machine, ask your par-
ents to check the machine very carefully. 
8. Don’t touch the areas shown, or

Page 24 of 364

YAMAHA TTR90 2004  Owners Manual  
CHAPTER 4
ENGINE 
CARBURETOR   
......................................... 4-1  
CYLINDER HEAD   
..................................... 4-8  
CAMSHAFT AND ROCKER ARMS   
....... 4-13  
VALVES AND VAL

Page 27 of 364

YAMAHA TTR90 2004  Owners Manual GEN
INFO
 
DESCRIPTION  
FAHRZEUGBESCHREIBUNG 
ALLGEMEINE ANGABEN 
FAHRZEUGBESCHREIBUNG 
1  
Motorstoppschalter “ENGINE STOP”  
2  
Hauptschalter (TT-R90E)  
3  
Startschalter (TT-R90E)  
4  
Hand

Page 46 of 364

YAMAHA TTR90 2004  Owners Manual 1 - 9
GEN
INFO
CONTROL FUNCTIONS
EC150000
CONTROL FUNCTIONS
MAIN SWITCH (TT-R90E)
Functions of the respective switch positions
are as follows:
ON: The engine can be started only at this
position.
OFF:

Page 48 of 364

YAMAHA TTR90 2004  Owners Manual 1 - 10
GEN
INFO
CONTROL FUNCTIONS
KICK STARTER
WARNING
Before starting the engine, be sure to shift
the transmission into neutral.
Rotate the kick starter 1 away from the
engine. Push the starter down

Page 54 of 364

YAMAHA TTR90 2004  Owners Manual 1 - 13
GEN
INFO
STARTING AND OPERATION
STARTING AND OPERATION
CAUTION:
Prior to operating the machine, perform
steps listed in pre-operation check list.
WARNING
Never start your engine or let it run f

Page 55 of 364

YAMAHA TTR90 2004  Owners Manual GEN
INFO
DEMARRAGE ET FONCTIONNEMENT
DEMARRAGE ET 
FONCTIONNEMENT
ATTENTION:
Avant d’utiliser le véhicule, toujours effectuer
les contrôles et entretiens avant utilisation
recommandés.
AVERTISSEM

Page 60 of 364

YAMAHA TTR90 2004  Owners Manual SPEC
 
2 - 3 Transmission:
Primary reduction system Spur gear
Primary reduction ratio 67/18 (3.722)
Secondary reduction system Chain drive
Secondary reduction ratio 35/14 (2.500)
Transmission type Con
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