2006 YAMAHA TTR50 engine

IMPORTANT NOTICE
This machine is designed for off-road use only
by young operators under adult instruction and
supervision. It is illegal for this machine to be
operated on any public street, road, or high-
way.
Off-road use on public lands may be illegal.
Please check local regulations before riding.1. GASOLINE IS HIGHLY FLAMMABLE: * Always turn off the engine when
refueling.
* Take care not to spill on the engine or exhaust pipe/muffler, when refu-
eling.
* Never refuel while smoking or in the vicinity of an open flame.
2. If you should swallow some gasoline or inhale a lot of gasoline vapor, or
allow some gasoline to get in your
eye(s), see your doctor immediately.
If any gasoline spills on your skin or
clothing, immediately wash it with
soap and water, and change your
clothes.
3. Always turn off the engine before leaving the machine unattended.
When parking the machine, note the
following:
* The engine and exhaust pipe(s)/muffler(s) may be hot. Park the
machine in a place where pedestri-
ans or children are not likely to
touch the machine.
* Do not park the machine on a slope or soft ground; the machine may
overturn.
SAFETY INFORMATION

4. When transporting the machine inanother vehicle, be sure is kept
upright and that the fuel cock is
turned to the “OFF ”. If it should lean
over, gasoline may leak out of the car-
buretor or fuel tank.
5. Never start your engine or let it run for any length of time in a closed
area. The exhaust fumes are poison-
ous and may cause loss of con-
sciousness and death within a short
time. Always operate your machine in
an area with adequate ventilation.
6. Always wear a helmet, gloves, boots, trousers, and jacket for motocross
riding.

SAFETY INFORMATION
1. Don’t ride it on the street.
2. Don ’t run the engine inside a building.
3. This is a one-seater motorbike. Don ’t give
any person a ride.
4. Let ’s learn how to ride properly. Ask your
parents for any question.
5. When riding the machine, be sure to wear the protective apparel as illustrated.
1Helmet
2 Goggles
3 Mouth guard
4 Gloves
5 Boots
6 Motocross pants
7 Long sleeved trainer

6. When going for riding, be sure to be withyour 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 you ’ll get
burnt in the hand.
9. Don ’t touch rotating or moving parts.
10. Before starting the engine, be sure to shift
the transmission into neutral.

EC080000
HOW TO USE
THIS MANUAL
EC081000
PARTICULARLY IMPORTANT
INFORMATION
The Safety Alert Symbol means ATTENTION!
BECOME ALERT! YOUR SAFETY IS
INVOLVED!
Failure to follow WARNING instructions could
result in severe injury or death to the machine
operator, a bystander, or a person inspecting
or repairing the machine.
A CAUTION indicates special precautions that
must be taken to avoid damage to the
machine.
NOTE: A NOTE provides key information to make pro-
cedures easier or clearer.
WARNING
CAUTION:
EC082000
FINDING THE REQUIRED PAGE
1. This manual consists of six chapters; “Gen-
eral Information ”, “Specifications ”, “Regular
inspection and adjustments ”, “Engine ”,
“ Chassis ” and “Electrical ”.
2. The table of contents is at the beginning of the manual. Look over the general layout of
the book before finding then required chap-
ter and item.
Bend the book at its edge, as shown, to
find the required fore edge symbol mark
and go to a page for required item and
description.

ILLUSTRATED SYMBOLS
(Refer to the illustration)
Illustrated symbols 1 to 6 are designed as
thumb tabs to indicate the chapter ’s number
and content.
1 General information
2 Specifications
3 Regular inspection and adjustments
4 Engine
5 Chassis
6 Electrical
Illustrated symbols
7 to D are used to identify
the specifications appearing in the text.
7 With engine mounted
8 Special tool
9 Filling fluid
0 Lubricant
A Tightening
B Specified value, Service limit
C Engine speed
D Resistance (
Ω), Voltage (V), Electric current (A)
Illustrated symbols
E to H in the exploded
diagram indicate grade of lubricant and loca-
tion of lubrication point.
E Apply engine oil
F Apply molybdenum disulfide oil
G Apply lightweight lithium-soap base grease
H Apply molybdenum disulfide grease
Illustrated symbols
I to J in the exploded
diagrams indicate where to apply a locking
agent and when to install new parts.
I Apply locking agent (LOCTITE®)
J Use new one
12
34
56
78
90
AB
CD
E

F
G
H
IJ
GEN
INFOSPEC
INSP ADJ
ENG
CHAS–+ELEC
T R..
EM
LSM
LTNew

INDEX
GENERAL INFORMATION
SPECIFICATIONS
REGULAR INSPECTION AND ADJUSTMENTS
ENGINE
CHASSIS
ELECTRICAL

CONTENTS
CHAPTER 1
GENERAL INFORMATION
DESCRIPTION ............................................1-1
MACHINE IDENTIFICATION ......................1-2
IMPORTANT INFORMATION .....................1-3
CHECKING OF CONNECTION ..................1-5
SPECIAL TOOLS .......................................1-6
CONTROL FUNCTIONS .............................1-8
FUEL .........................................................1-11
STARTING AND OPERATION .................1-12
CLEANING AND STORAGE ....................1-13
CHAPTER 2
SPECIFICATIONS
GENERAL SPECIFICATIONS ....................2-1
MAINTENANCE SPECIFICATIONS ...........2-4
GENERAL TORQUE
SPECIFICATIONS ....................................2-16
DEFINITION OF UNITS ............................2-16
CABLE ROUTING DIAGRAM ..................2-17
CHAPTER 3
REGULAR INSPECTION AND ADJUSTMENTS
MAINTENANCE INTERVALS ....................3-1
PRE-OPERATION INSPECTION AND
MAINTENANCE ..........................................3-3
ENGINE .......................................................3-4
CHASSIS ..................................................3-14
ELECTRICAL ............................................3-23