2006 YAMAHA TTR50 length

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.

GEN
INFO
1 - 12
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 for any
length of time in a closed area. The exhaust
fumes are poisonous and can cause loss of
consciousness and death within a short
time. Always operate your machine in an
area with adequate ventilation.
STARTING A COLD ENGINE
WARNING
Before starting the engine, be sure to shift
the transmission into neutral.
NOTE:
 This model is equipped with an ignition cir-
cuit cut-off system. In case of electric start-
ing, the engine can be started only when the
transmission is in neutral.
 If the engine fails to start by pushing the start
switch, release the switch, wait a few sec-
onds, and then try again. Each starting
attempt should be as short as possible to
preserve the battery. Do not crank the
engine more than 10 seconds on any one
attempt.
1. Turn the fuel cock to “ON ”.
2. Turn the main switch to “ON ”.
3. Shift the transmission into neutral.
4. Operate the starter (choke) and completely close the throttle grip.
5. Slide the “engine stop ” switch to the “”.
6. Start the engine by pushing the start switch.
7. After the engine starts, warm up for one or
two minutes. Make sure the stater (choke) is
returned to the original position before riding. STARTING A WARM ENGINE
To start a warm engine, refer to the
“START-
ING A COLD ENGINE ” section. The starter
(choke) should not be used. The throttle
should be opened slightly.
CAUTION:
See “Engine break-in Section ” prior to
operating engine for the first time.
WARMING UP
To get maximum engine life, always “warm-up ”
the engine before starting off. Never accelerate
hard with a cold engine! To see whether or not
the engine is warm, see if it responds to throttle
normally with the stater (choke) turned off.
WARNING
Before starting off, be sure to turn up or
remove the side stand.
Failure to retract the side stand completely
can result in a serious accident when you
try to turn a corner.
ENGINE BREAK-IN
Break-in is important to better fit the moving
and sliding parts as well as the installed parts.
It is also important to accustom the rider to the
machine better.
Avoid full-throttle run on a new machine for the
first 5 hours.
After the trial run, check for loose parts, oil
leakage and other problems.
Make full inspection and adjustment especially of
slack cables and drive chain and loose spokes.
CAUTION:
After the break-in period, check every fit-
ting and fastener for looseness.
If any loose is found, retighten it securely.

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

SPEC
2 - 6
Stem runout limit ---- 0.01 mm
(0.0004 in)
Valve seat width IN 0.9 ~ 1.1 mm (0.0354 ~ 0.0433 in)1.6 mm
(0.0630 in)
EX 0.9 ~ 1.1 mm (0.0354 ~ 0.0433 in) 1.6 mm
(0.0630 in)
Valve spring: Free length IN 32.45 mm (1.28 in) 30.83 mm (1.21 in)
EX 32.45 mm (1.28 in) 30.83 mm (1.21 in)
Set length (valve closed) IN 24.2 mm (0.95 in) ---- EX 24.2 mm (0.95 in) ----
Compressed pressure (installed) IN 138 ~ 158 N (14.07 ~ 16.11 kg,
31.02 ~ 35.52 lb)----
EX 138 ~ 158 N (14.07 ~ 16.11 kg,
31.02 ~ 35.52 lb) ----
Tilt limit IN ----
2.5 °/1.4 mm
(2.5 °/0.06 in)
EX ----2.5 °/1.4 mm
(2.5 °/0.06 in)
Direction of winding (top view) IN Clockwise ----
EX Clockwise ----
Item Standard Limit
*
MAINTENANCE SPECIFICATIONS

SPEC
2 - 11
CHASSIS
Item Standard Limit
Steering system: Steering bearing type Angular bearing ----
Front suspension: Front fork travel 96 mm (3.78 in) ----
Spring rate K1 7.95 N/mm (0.81 kgf/mm, 45.39 lb/in)----
K2 10.50 N/mm (1.07 kgf/mm, 59.96 lb/in) ----
Optional spring/spacer No ----
Inner tube outer diameter 21.7 mm (0.85 in) ----
Rear suspension: Shock absorber travel 47 mm (1.85 in) ----
Spring free length 114 mm (4.49 in) ----
Fitting length 110 mm (4.33 in) ----
Spring rate, STD K = 29.0 N/mm (2.96 kg/mm, 166 lb/in)----
Optional spring No ----
Swingarm: Swingarm free play limit End ---- 1.0 mm (0.0394 in)
Side clearance ---- 0.3 mm (0.0118 in)
Wheel: Front wheel type Spoke wheel ----
Rear wheel type Spoke wheel ----
Front rim size/material 10 × 1.40/steel ----
Rear rim size/material 10 × 1.40/steel ----
Rim runout limit: Radial ---- 2.0 mm (0.08 in)
Lateral ---- 2.0 mm (0.08 in)
Drive chain: Type/manufacturer 420/KMC ----
Number of links 79 links + joint ----
Chain slack 35 ~ 45 mm (1.38 ~ 1.77 in) ----
Chain length (15 links) ---- 194.3 mm (7.65 in)
MAINTENANCE SPECIFICATIONS

SPEC
2 - 14
EC212300
ELECTRICALItem Standard Limit
Ignition system: Advancer Digital ----
CDI: Magneto-model/manufacturer F1P6/MORIC ----
Pickup coil resistance (color) 248 ~ 372 Ω at 20 °C (68 °F)
(Red – White) ----
CDI unit model/manufacturer 1P6/SHY ----
Ignition coil: Model/manufacturer 4FP/SHY ----
Minimum spark gap 6 mm (0.24 in) ----
Primary winding resistance 0.32 ~ 0.48 Ω at 20 °C (68 °F) ----
Secondary winding resistance 5.68 ~ 8.52 k Ω at 20 °C (68 °F) ----
Spark plug cap: Type Resin ----
Resistance 10 k Ω at 20 °C (68 °F) ----
Charging system: System type AC magneto ----
Model/manufacturer F1P6/SHY ----
Normal output 14 V/80 W at 5,000 r/min ----
Charging coil resistance (color) 0.96 ~ 1.44 Ω at 20 °C (68 °F)
(White – Black) ----
Lighting coil resistance (color) 0.80 ~ 1.20 Ω at 20 °C (68 °F)
(Yellow – Black) ----
Rectifier/regulator: Regulator type Semiconductor short circuit ----
Model/manufacturer SH620B-12/SHINDENGEN ----
No-load regulated voltage (DC) 14.0 ~ 15.0 V ----
No-load regulated voltage (AC) 13.0 ~ 14.0 V ----
Rectifier capacity 8 A ----
Battery: Model YT4B-BS or GT4B-5 ----
Voltage capacity 12 V 2.3 Ah or 12 V 2.5 Ah ----
Electric starting system: Type Constant mesh ----
Starter motor: Model/manufacturer 1P6/SHY ----
Operation voltage 12 V ----
Output 0.25 kW ----
Armature coil resistance 0.035 ~ 0.043 Ω at 20 °C (68 °F) ----
Brush overall length 7 mm (0.28 in) 3.5 mm (0.14 in)
Brush quantity 2 pcs. ----
MAINTENANCE SPECIFICATIONS

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

3 - 5
INSPADJTHROTTLE CABLE ADJUSTMENT/
SPEED LIMITER ADJUSTMENT
Handlebar side
Loosen the locknut 3 on throttle cable.
 Turn the adjuster 4 in or out until the
specified free play is obtained.
Turning in d → Free play is increased.
Turning out e → Free play is decreased.
 Tighten the locknut.
WARNING
After adjusting, turn the handlebar to
right and left and make sure that the
engine idling does not run faster.
4
d
e
3
SPEED LIMITER ADJUSTMENT
The speed limiter keeps the carburetor throttle
from becoming fully-opened even when the
throttle lever is applied to the maximum posi-
tion. Screwing in the adjuster stops the engine
speed from increasing.
1. Measure:

speed limiter length a
Out of specification → Adjust.
2. Adjust:
 speed limiter length
Speed limiter length:
Less than 25 mm (0.98 in)
Speed limiter adjustment steps:
 Loosen the locknut 1.
 Turn the adjuster 2 in or out until the
specified speed limiter length is obtained.
Turning in a → Speed limiter length is
decreased.
Turning out b → Speed limiter length is
increased.
a
1 2
a
b