2006 YAMAHA TTR50 checking oil

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INSPADJ
6. Lubricate:
Drive chain
Drive chain lubricant:
SAE 10W-30 motor oil or
suitable chain lubricants
DRIVE CHAIN SLACK ADJUSTMENT
1. Elevate the rear wheel by placing the suit-
able stand under the engine.
2. Check: Drive chain slack a
In the center between the drive axle and
rear wheel axle.
Out of specification → Adjust.
NOTE:
Before checking and/or adjusting, rotate the
rear wheel through several revolutions and
check the slack several times to find the tight-
est point. Check and/or adjust chain slack with
rear wheel in this “tight chain ” position.
Drive chain slack:
35 ~ 45 mm (1.38 ~ 1.77 in)
3. Adjust:
Drive chain slack
Drive chain slack adjustment steps:
 Loosen the wheel axle nut 1 and locknuts
2 .
 Adjust chain slack by turning the adjusters
3 .
To tighten → Turn adjuster 3 clockwise a.
To loosen → Turn adjuster 3 counter-
clockwise b and push wheel forward.
 Turn each adjuster exactly the same
amount to maintain correct axle alignment.
(There are marks c on each side of chain
puller alignment.)
1 b
c
a
23
DRIVE CHAIN INSPECTION/
DRIVE CHAIN SLACK ADJUSTMENT

–+ELEC
6 - 2
IGNITION SYSTEM
EC620000
IGNITION SYSTEM
INSPECTION STEPS
Use the following steps for checking the possibility of the malfunctioning engine being attributable to
ignition system failure and for checking the spark plug which will not spark.
NOTE:
Remove the following parts before inspection.
1) Seat assembly
2) Air scoops (left and right)
3) Fuel tank
Refer to “FRONT FENDER, SEAT ASSEMBLY AND FUEL TANK ” section in the CHAPTER 4.
 Use the following special tools in this inspection.
Opama pet-4000 spark checker:
YM-34487
Ignition checker: 90890-06754Pocket tester:YU-03112-C/90890-03112
Spark gap test Clean or replace
spark plug.
Check entire ignition
system for connection. Repair or replace.
Check main switch. Replace.
Check engine stop switch. Replace.
Check ignition coil. Primary coil Replace. Secondary coil Replace.
Check AC magneto. Pickup coil Replace. Replace CDI unit.
No Spark
OK
OK
OK
OK
OK
Spark
No good
No good
No good
No good
No good
No good

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–+ELECCHARGING SYSTEM
EC624000
COUPLERS AND LEADS CONNECTION
INSPECTION
1. Check:
Couplers and leads connection
Rust/dust/looseness/short-circuit →
Repair or replace.
CHARGING VOLTAGE INSPECTION
1. Start the engine.
2. Inspect: Charging voltage
Out of specification → If no failure is
found in checking the charging coil resis-
tance, replace the rectifier/regulator.
Tester (+) lead → Red lead
1
Tester ( –) lead
→ Black lead
2
Charging
voltage Tester selector
position
14.0 V at
5,000 r/min DCV-20
2
1
W R
Y/R
B
AC MAGNETO INSPECTION
1. Inspect: Charging coil resistance
Out of specification → Replace.
Tester (+) lead → White lead
1
Tester ( –) lead
→ Black lead
2
Charging coil
resistance Tester selector
position
0.96 ~ 1.44 Ω at
20 °C (68 °F) Ω

× 1
WSb
B
Y 1
2

–+ELEC
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CARBURETOR HEATING SYSTEM
CARBURETOR HEATING SYSTEM
INSPECTION STEPS
Use the following steps for checking the possibility of the malfunctioning carburetor heating system.
NOTE:
 Remove the following parts before inspection.
1) Seat
2) Fuel tank
Refer to “FRONT FENDER, SEAT ASSEMBLY AND FUEL TANK ” section in the CHAPTER 4.
 Use the following special tools in this inspection.
Pocket tester:
YU-03112-C/90890-03112
Check entire carburetor
heating system for connec- tion. Repair or replace.
Check thermo switch. Replace.
Check carburetor heater. Replace. Check AC magneto. Lighting coil Replace.
Replace rectifier/regulator.
OK
OK
OK
OK
No good
No good
No good
No good