Page 4 of 390

INTRODUCTION
Congratulations on your purchase of a
Yamaha TT-R50E/TT-R50EV. This model is
the culmination of Yamaha’s vast experience
in the production of pacesetting racing
machines. It represents the highest grade of
craftsmanship and reliability that have made
Yamaha a leader.
This manual explains operation, inspection
and basic maintenance of your machine. If you
have any questions about this manual or your
machine, please contact your Yamaha dealer.
NOTE:
As improvements are made on this model,
some data in this manual may become out-
dated. If you have any questions, please con-
sult your Yamaha dealer.
WARNING
READ THIS MANUAL CAREFULLY FOR
INSTRUCTIONS ON HOW TO PROPERLY
OPERATE THIS MACHINE.
ADULT INSTRUCTION AND SUPERVI-
SION ARE REQUIRED.
WEIGHT OF THE RIDER SHOULD NOT
EXCEED 40 kg (88 lb).
ALWAYS WEAR A HELMET AND SUIT-
ABLE PROTECTIVE CLOTHING WHEN
RIDING.
DO NOT TOUCH ANY MOVING PARTS OR
HEATED AREAS.
ALWAYS PERFORM PRE-OPERATION
CHECKS. REFER TO PAGE 3-3.
THIS MACHINE IS DESIGNED TO CARRY
THE OPERATOR ONLY. NO PASSEN-
GERS.
THIS MACHINE IS DESIGNED OFF-ROAD
USE ONLY.
IT IS NOT SUITABLE FOR ON-ROAD USE.
Page 18 of 390

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
Page 32 of 390

1 - 4
GEN
INFO
IMPORTANT INFORMATION
EC132000
ALL REPLACEMENT PARTS
1. We recommend to use Yamaha genuine
parts for all replacements. Use oil and/or
grease recommended by Yamaha for
assembly and adjustment.
EC133000
GASKETS, OIL SEALS AND O-RINGS
1. All gaskets, oil seals, and O-rings shouldbe replaced when an engine is overhauled.
All gasket surfaces, oil seal lips, and O-
rings must be cleaned.
2. Properly oil all mating parts and bearings
during reassembly. Apply grease to the oil
seal lips.
EC134000
LOCK WASHERS/PLATES AND COTTER
PINS
1. All lock washers/plates 1 and cotter pins
must be replaced when they are removed.
Lock tab(s) should be bent along the bolt or
nut flat(s) after the bolt or nut has been
properly tightened.
EC135001
BEARINGS AND OIL SEALS
1. Install the bearing(s) 1 and oil seal(s) 2
with their manufacturer ’s marks or numbers
facing outward. (In other words, the
stamped letters must be on the side
exposed to view.) When installing oil
seal(s), apply a light coating of light-weight
lithium base grease to the seal lip(s). Oil
the bearings liberally when installing.
CAUTION:
Do not use compressed air to spin the
bearings dry. This causes damage to the
bearing surfaces.
Page 36 of 390

GEN
INFO
1 - 6
SPECIAL TOOLS
SPECIAL TOOLS
The proper special tools are necessary for complete and accurate tune-up and assembly. Using the
correct special tool will help prevent damage caused by the use of improper tools or improvised
techniques. The shape and part number used for the special tool differ by country, so two types are
provided. Refer to the list provided to avoid errors when placing an order.
NOTE:
For U.S.A. and Canada, use part number starting with “YM- ”, “YU- ”, “YS- ” or “ACC- ”.
For others, use part number starting with “90890- ”.
Part number Tool name/How to use Illustration
YU-01083-3, 90890-01084
YU-01083-1, 90890-01083 Weight
Slide hammer bolt
These tools are used when removing or installing the
rocker arm shafts. YU-01083-3
YU-01083-1
90890-01084
90890-01083
YU-03112-C, 90890-03112 Pocket tester Use this tool to inspect the coil resistance, output
voltage and amperage. YU-03112-C 90890-03112
YM-04019, 90890-04019 Valve spring compressor This tool is needed to remove and install the valve
assemblies. YM-04019 90890-04019
YM-04108, 90890-04108 Valve spring compressor attachment This tool is needed to remove and install the valve
assemblies. YM-04108 90890-04108
YU-01304, 90890-01304 Piston pin puller set This tool is used to remove the piston pin. YU-01304 90890-01304
YM-01312-A, 90890-01312 Fuel level gauge This gauge is used to measure the fuel level in the
float chamber. YM-01312-A 90890-01312
YM-08035-A, 90890-01311 Tappet adjusting tool This tool is necessary for adjusting valve clearance. YM-08035-A 90890-01311
Page 56 of 390

SPEC
2 - 1
EC200000
SPECIFICATIONS
EC211000
GENERAL SPECIFICATIONS
Model name: TT-R50EV (USA, CDN, AUS, NZ)TT-R50E (Europe, ZA)
Model code number: 1P61 (USA) 1P62 (CDN)
1P63 (Europe, AUS, NZ, ZA)
Dimensions: Overall length 1,305 mm (51.4 in)
Overall width 595 mm (23.4 in)
Overall height 775 mm (30.5 in)
Seat height 555 mm (21.9 in)
Wheelbase 925 mm (36.4 in)
Minimum ground clearance 135 mm (5.31 in)
Dry weight: Without oil and fuel 54.0 kg (119 lb)
Engine: Engine type Air cooled 4-stroke, SOHC
Cylinder arrangement Forward-inclined single cylinder
Displacement 49.5 cm
3 (3.02 cu.in)
Bore × stroke 36.0 × 48.6 mm (1.42 × 1.91 in)
Compression ratio 9.5 : 1
Compression pressure (STD) 1,300 kPa (13 kg/cm
2, 185 psi) at 600 r/min
Starting system Electric starter
Lubrication system: Wet sump
Oil type or grade: Engine oil
(For USA and CDN)
At –10 °C (14 °F) or higher È
Yamalube 4 (10W-30) or SAE 10W-30 type
SE/SF/SG motor oil
At 5 °C (41 °F) or higher É
Yamalube 4 (20W-40) or SAE 20W-40 type
SE/SF/SG motor oil
(Except for USA and CDN)
API “SE/SF/SG ” or higher grade
0 10 30 50 70 90 110 130
-20 -10 0 10
20
30 40 50
È
É
˚F
˚C
GENERAL SPECIFICATIONS
Page 71 of 390

SPEC
2 - 16
EC220001
GENERAL TORQUE SPECIFICATIONS
This chart specifies torque for standard fasten-
ers with standard I.S.O. pitch threads. Torque
specifications for special components or
assemblies are included in the applicable sec-
tions of this book. To avoid warpage, tighten
multi-fastener assemblies in a crisscross fash-
ion, in progressive stages, until full torque is
reached. Unless otherwise specified, torque
specifications call for clean, dry threads. Com-
ponents should be at room temperature.
A: Distance between flats
B: Outside thread diameter
EC230000
DEFINITION OF UNITS
A
(Nut) B
(Bolt) TORQUE
SPECIFICATION
Nm m ·kg ft ·lb
10 mm
12 mm
14 mm
17 mm
19 mm
22 mm 6 mm
8 mm
10 mm
12 mm
14 mm
16 mm 6
15
30
55
85
130 0.6
1.5
3.0
5.5
8.5
13 4.3
11
22
40
61
94
Unit Read Definition Measure
mm
cm millimeter
centimeter 10
-3 meter
10-2 meter Length
Length
kg kilogram 10
3 gram Weight
N Newton 1 kg × m/sec
2 Force
Nm
m kg Newton meter
Meter kilogram N
× m
m × kg Torque
Torque
Pa Pascal N/m
2Pressure
N/mm Newton per millimeter N/mm Spring rate
L
cm
3 Liter
Cubic centimeter
—
—Volume or capacity
Volume or capacity
r/min Revolution per minute —Engine speed
GENERAL TORQUE SPECIFICATIONS/
DEFINITION OF UNITS
Page 166 of 390
3 - 22
INSPADJ
LUBRICATION
LUBRICATION
To ensure smooth operation of all compo-
nents, lubricate your machine during setup,
after break-in, and after every race.
1 All control cable
2 Brake lever pivot
3 Shift pedal pivot
4 Footrest pivot
5 Throttle-to-handlebar contact
6 Drive chain
7 Tube guide cable winding portion
8 Throttle cable end
9 Brake cable end È
Use Yamaha cable lube or equivalent on these
areas.
É Use SAE 10W-30 motor oil or suitable chain
lubricants.
Ê Lubricate the following areas with high quality,
lightweight lithium-soap base grease.
AAA
AAB
CC
7 8
Page 202 of 390

4 - 8
ENGCARBURETOR
Float height
1. Measure:Float height a
Out of specification → Adjust.
Float height:
18.5 mm (0.73 in)
Measurement and adjustment steps:
Hold the carburetor in an upside down
position.
NOTE:
Slowly tilt the carburetor in the opposite
direction, then take the measurement
when the needle valve aligns with the float
arm.
If the carburetor is level, the weight of the
float will push in the needle valve, resulting
in an incorrect measurement.
Measure the distance between the mating
surface of the float chamber and top of the
float using a vernier calipers.
NOTE:
The float arm should be resting on the nee-
dle valve, but not compressing the needle
valve.
If the float height is not within specification,
inspect the valve seat and needle valve.
If either is worn, replace them both.
If both are fine, adjust the float height by
bending the float tab b on the float.
Recheck the float height.
a
b
EC464600
Float
1. Inspect:
Float 1
Damage → Replace.
1