2006 YAMAHA TTR90 tire pressure

SPEC
2 - 3 Transmission:
Primary reduction system Spur gear
Primary reduction ratio 67/18 (3.722)
Secondary reduction system Chain drive
Secondary reduction ratio 35/14 (2.500)
Transmission type Constant mesh, 3-speed
Operation Left foot operation
Gear ratio: 1st 37/13 (2.846)
2nd 33/19 (1.736)
3rd 28/23 (1.217)
Chassis:
Frame type Steel tube backbone
Caster angle 24.83°
Trail 56.0 mm (2.2 in)
Tire:
Type With tube
Size (front) 2.50-14 4PR
Size (rear) 3.00-12 4PR
Manufacturer (front and rear) CHENG SHIN
Type (front and rear) KNOBBY
Tire pressure (front and rear) 100 kPa (1.00 kgf/cm
2, 14.5 psi)
Brake:
Front brake type Drum brake
Operation Right hand operation
Rear brake type Drum brake
Operation Right foot operation
Suspension:
Front suspension Telescopic fork
Rear suspension Swingarm (monocross suspension)
Shock absorber:
Front shock absorber Coil spring/oil damper
Rear shock absorber Coil spring/gas, oil damper
Wheel travel:
Front wheel travel 110 mm (4.33 in)
Rear wheel travel 95 mm (3.74 in)
Electrical:
Ignition system CDI
Generator system (TT-R90E) CDI magneto
Battery type (TT-R90E) GT4B-5
Battery voltage/capacity (TT-R90E) 12 V/2.5 AH
Specific gravity (TT-R90E) 1.350
GENERAL SPECIFICATIONS

3 - 1
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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.
NOTE:
From 18 months or 210 hours, repeat the maintenance intervals starting from 6 months or
90 hours.
Items marked with an asterisk should be performed by a Yamaha dealer as they require special
tools, data and technical skills.
No. ITEMCHECKS AND
MAINTENANCE JOBSWHICH-
EVER
COMES
FIRSTINITIAL EVERY
month 1 6 12
hours 30 90 150
1 * Fuel lineCheck fuel hoses for cracks or damage.
Replace if necessary.√
√
2 Spark plugCheck condition.
Adjust gap and clean.√
√
3 * Valve clearanceCheck and adjust valve clearance when engine is
cold.√
4 * Air filter elementClean with solvent.
Replace if necessary.√
√
5 * Breather systemCheck ventilation hose for cracks or damage.
Replace if necessary.√
√
√
6 * CarburetorCheck engine idling speed and starter operation.
Adjust if necessary.√
√
√
7 Exhaust systemCheck for leakage.
Tighten if necessary.
Replace gasket if necessary.√
√
8 Engine oil Change (warm engine before draining).
√
√
√
9 ClutchCheck operation.
Adjust or replace cable.√
√
√
10 * Front brakeCheck operation.
Adjust brake lever free play and replace brake shoes
if necessary.√
√
√
11 * Rear brakeCheck operation.
Adjust brake pedal free play and replace brake shoes
if necessary.√
√
√
12 * WheelsCheck runout, spoke tightness and for damage.
Tighten spokes if necessary.√
√
√
13 * TiresCheck tread depth and for damage.
Replace if necessary.
Check air pressure.
Correct if necessary.√
√
14 * Wheel bearingsCheck bearings for smooth operation.
Replace if necessary.√
√
15 * SwingarmCheck swingarm pivoting point for play.
Correct if necessary.
Lubricate with lithium soap based grease.√
√
√
16 Drive chainCheck chain slack/alignment and condition.
Adjust and lubricate chain.Every ride
3

3 - 3
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PRE-OPERATION INSPECTION AND MAINTENANCE
PRE-OPERATION INSPECTION AND MAINTENANCE
Before riding for break-in operation or practice, make sure the machine is in good operating condi-
tion.
Before using this machine, check the following points.
GENERAL INSPECTION AND MAINTENANCE
Item Routine Page
Brake Check operation/adjustment. P3-12
Engine oil Change oil as required. P3-6 ~ 8
Drive chain Check alignment/adjustment/lubrication. P3-13 ~ 15
Spark plug Check color/condition. P3-23
Throttle Check for proper throttle cable operation. P3-4
Air filter Foam type – must be clean and damp oil always P3-4 ~ 5
Wheels and tires Check pressure/runout/spoke tightness/bead stopper/axle nuts. P3-17 ~ 20
Fittings/fasteners Check all – tighten as necessary. P2-13

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6. Install:
Rear shock absorber
Refer to “SWINGARM” section in the
CHAPTER 5.
EC36Q000
TIRE PRESSURE CHECK
1. Measure:
Tire pressure
Out of specification → Adjust.
NOTE:
Check the tire while it is cold.
Loose bead stoppers allow the tire to slip off
its position on the rim when the tire pressure
is low.
A tilted tire valve stem indicates that the tire
slips off its position on the rim.
If the tire valve stem is found tilted, the tire is
considered to be slipping off its position. Cor-
rect the tire position.
Standard tire pressure:
100 kPa (1.00 kgf/cm2, 14.5 psi)
SPOKES INSPECTION AND TIGHTENING
1. Inspect:
Spokes 1
Bend/damage → Replace.
Loose spoke → Retighten.
2. Tighten:
Spokes
NOTE:
Be sure to retighten these spokes before and
after break-in. After a practice or a race check
spokes for looseness.
T R..2 Nm (0.2 m · kg, 1.4 ft · lb)
TIRE PRESSURE CHECK/
SPOKES INSPECTION AND TIGHTENING