fuel filter YAMAHA TTR50 2006 Owners Manual

1 - 9
GEN
INFO
CONTROL FUNCTIONS
EC155001
THROTTLE GRIP
The throttle grip 1 is located on the right han-
dlebar; it accelerates or decelerates the
engine. For acceleration, turn the grip toward
you; for deceleration, turn it away from you.
1
EC156000
FRONT BRAKE LEVER
The front brake lever 1 is located on the right
handlebar. Pull it toward the handlebar to acti-
vate the front brake.
1
EC157000
REAR BRAKE PEDAL
The rear brake pedal 1 is located on the right
side of the machine. Press down on the brake
pedal to activate the rear brake.
1
FUEL COCK
The fuel cock supplies fuel from the tank to
carburetor while filtering the fuel. The fuel cock
has the three positions:
OFF: With the lever in this position, fuel will not flow. Always return the lever to this posi-
tion when the engine is not running.
ON: With the lever in this position, fuel flows to the carburetor. Normal riding is done
with the lever in this position.
RES: This indicates reserve. If you run out of fuel while riding, move the lever to this
position. FILL THE TANK AT THE FIRST
OPPORTUNITY. BE SURE TO SET
THE LEVER TO “ON ” AFTER REFUEL-
ING.

SPEC
2 - 2
Oil capacity:
Engine oil Periodic oil change 0.8 L (0.70 Imp qt, 0.85 US qt)
Total amount 1.0 L (0.88 Imp qt, 1.06 US qt)
Air filter: Wet element
Fuel: Type Unleaded gasoline only (USA, AUS and NZ) Regular unleaded gasoline only
(CDN, Europe and ZA)
Tank capacity 3.1 L (0.68 Imp gal, 0.82 US gal)
Reserve amount 0.4 L (0.09 Imp gal, 0.11 US gal)
Carburetor: Type VM11
Manufacturer MIKUNI
Spark plug: Type CR7HSA
Manufacturer NGK
Gap 0.6 ~ 0.7 mm (0.024 ~ 0.028 in)
Clutch type: Wet, multiple-disc and centrifugal automatic
Transmission: Primary reduction system Spur gear
Primary reduction ratio 67/18 (3.722)
Secondary reduction system Chain drive
Secondary reduction ratio 37/13 (2.846)
Transmission type Constant mesh, 3-speed
Operation Left foot operation
Gear ratio: 1st 39/12 (3.250) 2nd 33/19 (1.736)
3rd 28/23 (1.217)
Chassis: Frame type Steel tube backbone
Caster angle 25.50 °
Trail 34.0 mm (1.34 in)
Tire: Type With tube
Size (front) 2.50-10 4PR
Size (rear) 2.50-10 4PR
Manufacturer (front and rear) CHENG SHIN
Type (front and rear) KNOBBY
Tire pressure (front and rear) 100 kPa (1.00 kgf/cm
2, 14.2 psi)
Brake: Front brake type Drum brake
Operation Right hand operation
Rear brake type Drum brake
Operation Right foot operation
GENERAL SPECIFICATIONS
1
2
3
4
5
6

SPEC
2 - 9
Carburetor:
I. D. mark 1P61 00 ----
Main jet (M.J) #62.5 ----
Main nozzle (N.J) E-2M ----
Main air jet (M.A.J) ø 1.4 ----
Jet needle (J.N) 4DL22-1 ----
Cutaway (C.A) 2.5 ----
Pilot outlet (P.O) ø 0.8 × 1.5 ----
Pilot jet (P.J) #12.5 ----
Valve seat size (V.S) ø 1.2 ----
Starter jet 1 (G.S.1) #20 ----
Starter jet 2 (G.S.2) ø 0.6 ----
Float height (F.H) 18.5 mm (0.73 in) ----
Fuel level (F.L) 2.0 ~ 3.0 mm (0.08 ~ 0.12 in) ----
Engine idle speed 1,600 ~ 1,800 r/min ----
Lubrication system: Oil filter type Wire mesh type ----
Oil pump type Trochoid type ----
Inner-rotor-to-outer-rotor-tip clearance 0.15 mm or less (0.0061 in or less)0.20 mm
(0.0079 in)
Outer-rotor-to-oil-pump-housing clearance 0.07 mm (0.0028 in)0.15 mm
(0.0059 in)
Oil-pump-housing-to-inner-rotor-and-outer-
rotor clearance 0.06 ~ 0.10 mm
(0.0024 ~ 0.0039 in)0.17 mm
(0.0067 in)
Item Standard Limit
MAINTENANCE SPECIFICATIONS

2 - 24
SPECCABLE ROUTING DIAGRAM
ÒFasten the wire harness, AC magneto lead, and
starter motor lead to the frame with a plastic
locking tie at the location shown in the illustra-
tion. Cut off the excess end of the plastic locking
tie, and then face the cut end of the tie upward.
The cut end of the plastic locking tie should be
5 mm (0.20 in) or less.
Ó Gather the slack of the AC magneto lead and
starter motor lead in the area shown in the illus-
tration, and then place the slack between the air
filter case and battery. Ô
Pass the brake cable through the guides on the
front fork guard.
Õ Do not fasten the rectifier/regulator lead.
Ö Do not pinch the starter motor lead.
× Before installing the CDI unit, connect the AC
magneto lead couplers and place them under
the wire harness in the CDI unit holder.
Ø Place the cover on the CDI unit, and then install
the CDI unit in the CDI unit holder.
RES
OFF
FUEL
A
EE
A
B C
C
B
G
G
D
F
È1
ÕJ
2
3
4
5
8
\f
6
Ê
\bÎ
0 Ï
\b Ò
L \b
B
C
D
E
F
G
H I
B I
H
C
NB
M B
P O
R Q
I
S
I
K
I
B
C
I
H
B
C
\f C
Ó
×
Ø
Ô
ÐÑ
Ì
Í
7 \f
É
C-C
E-EA-A
B-B
G-G
D
F

3 - 1
INSPADJ
MAINTENANCE INTERVALS
EC300000
REGULAR INSPECTION AND ADJUSTMENTS
MAINTENANCE INTERVALS
The following schedule is intended as a general guide to maintenance and lubrication. Bear in mind
that such factors as weather, terrain, geographical location, and individual usage will alter the
required maintenance and lubrication intervals. If you are a doubt as to what intervals to follow in
maintaining and lubricating your machine, consult your Yamaha dealer.
No. ITEM CHECKS AND
MAINTENANCE JOBS WHICH-
EVER
COMES
FIRST INITIAL EVERY
month 1 6 12
hours 30 60 120
1 * Fuel line Check fuel hoses for cracks or damage.
Replace if necessary.
√

√
2 Spark plug Check condition.
Adjust gap and clean.
√

√
3 * Valve clearance Check and adjust valve clearance when engine is
cold.
√

4 * Air filter element Clean with solvent.
Replace if necessary.
√

√
5 * Breather system Check ventilation hose for cracks or damage.
Replace if necessary.
√

√
√
6 * Carburetor Check engine idling speed and starter operation.
Adjust if necessary.
√

√
√
7 Exhaust system Check for leakage.
Tighten if necessary.
Replace gasket if necessary.
√

√
8 Engine oil Change (warm engine before draining). √
√
√
9 * Clutch Check operation.
Adjust if necessary.
√

√
√
10 * Front brake Check operation.
Adjust brake lever free play and replace brake shoes
if necessary.
√

√
√
11 * Rear brake Check operation.
Adjust brake pedal free play and replace brake shoes
if necessary. √

√
√
12 * Wheels Check runout, spoke tightness and for damage.
Tighten spokes if necessary.
√

√
√
13 * Tires Check tread depth and for damage.
Replace if necessary.
Check air pressure.
Correct if necessary.
√

√
14 * Wheel bearings Check bearings for smooth operation.
Replace if necessary.
√

√
15 * Swingarm Check swingarm pivoting point for play.
Correct if necessary.
Lubricate with lithium soap based grease. √

√
√
16 Drive chain Check chain slack/alignment and condition.
Adjust and lubricate chain. Every ride
17 * Steering bearings Check bearing assemblies for looseness.
Lubricate with lithium soap based grease every
120 hours or 12 months (whichever comes first).
√

√
18 Brake lever pivot
shaft Apply lithium soap based grease lightly.
√
√
√
19 Brake pedal pivot
shaft Apply lithium soap based grease lightly.
√
√
√
3

3 - 6
INSPADJ
 Tighten the locknut.
WARNING
Particularly for a beginner rider, the
speed limiter should be screwed in
completely. Screw it out little by little as
their riding technique improves. Never
remove the speed limiter for a begin-
ning rider.
 For proper throttle lever operation do
not turn out the adjuster more than
25.0 mm (0.98 in). Also, always adjust
the throttle lever free play to 3 ~ 5 mm
(0.12 ~ 0.20 in).
AIR FILTER CLEANING
NOTE:
Proper air filter maintenance is the biggest key
to preventing premature engine wear and
damage.
CAUTION:
Never run the engine without the air filter
element in place; this would allow dirt and
dust to enter the engine and cause rapid
wear and possible engine damage.
1. Remove: Seat assembly
 Air scoop (left)
Refer to “FRONT FENDER, SEAT
ASSEMBLY AND FUEL TANK ” section in
the CHAPTER 4.
 Air filter case cover 1
 Air filter element
1
SPEED LIMITER ADJUSTMENT/AIR FILTER CLEANING

4 - 1
ENGFRONT FENDER, SEAT ASSEMBLY AND FUEL TANK
EC400000
ENGINE
EC4R0000
FRONT FENDER, SEAT ASSEMBLY AND FUEL TANK
Extent of removal:1 Front fender removal
2 Seat removal
3 Battery removal
4 Fuel tank removal
5 Air filter case removal
6 Bottom cover removal
Extent of removal Order Part name Q ’ty Remarks
FRONT FENDER, SEAT
ASSEMBLY AND FUEL TANK
REMOVAL
Preparation for removal Turn the fuel cock to “OFF ”.
1 Front fender 1
2 Seat assembly 1
3 Air scoop (left and right) 2
4 Battery cover 1
5 Battery coupler 1 Disconnect.
6 Battery band 1
7 Battery rubber cover 1
8 Battery 1
9 Fitting band 1
10 Fuel hose 1 Remove on fuel tank side.
1
2
3
43
4
5
5

4 - 2
ENGFRONT FENDER, SEAT ASSEMBLY AND FUEL TANK
Extent of removal Order Part name Q’ty Remarks
11 Bolt (fuel tank) 2
12 Fuel tank 1
13 Air filter case cover 1
14 Air filter element 1
15 Air filter case 1
16 Bottom cover 1
4
5
6

4 - 4
ENG
CARBURETOR
2
1
6
6
3
8
9 5
47
New
New
T R..7 Nm (0.7 m
•
kg, 5.1 ft • Ib)
New
T R..2 Nm (0.2 m •
kg, 1.4 ft • Ib)
Extent of removal: 1 Carburetor removal
Extent of removal Order Part name Q ’ty Remarks
CARBURETOR REMOVAL
Preparation for removal Fuel tank Refer to “FRONT FENDER, SEAT
ASSEMBLY AND FUEL TANK ” section.
1 Clamp (air filter joint) 1 Loosen the screw (air filter joint).
2 Carburetor heater lead connector 2
3 Air vent hose 1
4 Fuel hose 1
5 Carburetor assembly 1
6O-ring 2
7 Joint 1
8 Carburetor top 1
9 Starter plunger assembly 1
1
CARBURETOR

4 - 6
ENGCARBURETOR
Extent of removal Order Part name Q’ty Remarks
C Float pin 1
D Float 1
E Needle valve set 1
F Main jet 1
G Needle jet 1
H Pilot jet 1
I Throttle stop screw set 1
J Carburetor heater 1
K Fuel filter 1
1