2006 YAMAHA TTR50 Gasoline

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.

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GEN
INFO
FUEL
Use regular gasoline. Always use fresh, name
brand gasoline.
WARNING
Do not overfill the fuel tank. Avoid spilling
fuel on the hot engine. Do not fill the fuel
tank above the bottom of the filler tube 1
as shown in the illustration or it may over-
flow when the fuel heats up later and
expands.
a Fuel level
CAUTION:
Use only unleaded gasoline. The use of
leaded gasoline will cause severe damage
to the engine internal parts such as valves,
piston rings, and exhaust system, etc.
Recommended fuel: For USA, AUS and NZ: Unleaded gasoline only
For CDN, EUROPE and ZA: Regular unleaded gasoline
only
Fuel tank capacity: Total: 3.1 L (0.68 Imp gal, 0.82 US gal)
Reserve: 0.4 L (0.09 lmp gal, 0.11 US gal)
FUEL

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

3 - 3
INSPADJ
PRE-OPERATION INSPECTION AND MAINTENANCE
PRE-OPERATION INSPECTION AND MAINTENANCE
Before riding for break-in operation, practice or a race, make sure the machine is in good operating
condition.
Before using this machine, check the following points.
GENERAL INSPECTION AND MAINTENANCE
Item Routine Page
Fuel Check that a fresh gasoline is filled in the fuel tank. Check the fuel line
for leakage. P.1-11
Engine oil Check that the oil level is correct. Check the crankcase for leakage. P.3-7 ~ 9
Throttle Check for proper throttle cable operation. P.3-4 ~ 5
Brakes Check the play of front and rear brake and effect of front and rear
brake. P.3-14 ~ 15
Drive chain Check chain slack and alignment. Check that the chain is lubricated
properly. P.3-16 ~ 18
Wheels and tires Check pressure/runout/spoke tightness/bead stopper/axle nuts. P.3-19 ~ 20
Steering Check that the handlebar can be turned smoothly and have no exces-
sive play. P.3-20 ~ 21
Front forks and rear
shock absorber assembly Check that they operate smoothly and there is no oil leakage. P.3-18
Cables (wires) Check that the throttle cable move smoothly. Check that they are not
caught when the handlebars are turned. —
Muffler Check that the muffler is tightly mounted and has no cracks. P.4-3
Sprocket Check that the driven sprocket tightening nut is not loose. P.3-15
Lubrication Check for smooth operation. Lubricate if necessary. P.3-22
Spark plug Check color/condition. P.3-23
Fittings/fasteners Check all – tighten as necessary. P.2-13
Lead connectors Check that the AC magneto, CDI unit, and ignition coil are connected
tightly. P.1-5

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ENGCARBURETOR
Fuel filter
1. Inspect:Fuel filter 1
Damage → Replace.
1
ASSEMBLY AND INSTALLATION
Carburetor
1. Install:
Clip 1
NOTE:
Align the space b between the clip ends with
the slit a of the throttle valve.
1
a
b
2. Install: Starter plunger 1
NOTE:
Align the slit a of the throttle valve with the tab
b of the carburetor top.
1
ba
FUEL LEVEL ADJUSTMENT
WARNING
Gasoline (fuel) and its vapors are highly
flammable and explosive. Keep away from
sparks, cigarettes, flames or other sources
of ignition.
1. Measure:
Fuel level a
Use a fuel level gauge 1.
Out of specification → Adjust.
Fuel level gauge:
YM-01312-A/90890-01312
Fuel level:2.0 ~ 3.0 mm (0.08 ~ 0.12 in)
Below the float chamber mating
surface
a
1