Yamaha YZF-R125 Service Manual: Installing the thermostat
1. Install:
- Thermostat
NOTE:
Install the thermostat with its breather hole "a"
facing up.
2. Install:
- Copper washer
- Coolant temperature sensor
| CAUTION: Use extreme care when handling the coolant temperature sensor. Replace any part that was dropped or subjected to a strong impact. |
3. Fill:
- Cooling system (with the specified amount of the recommended coolant) Refer to "CHANGING THE COOLANT" on page 3-15.
4. Check:
- Cooling system
Leaks
Repair or replace any
faulty part.
5. Measure:
- Radiator cap opening pressure
Below the specified pressure
Replace the radiator cap.Refer to "CHECKING THE RADIATOR" on page 6-3.
Checking the thermostat
1. Check:
Thermostat
Does not open at 80.5-83.5 C (176.9-182.3
F) Replace.
a. Suspend the thermostat "1" in a container "2"
filled with water.
b. Slowly heat the water "3".
c. ...
Water pump
...
Other materials:
Checking the decompression system
1. Check:
Decompression system
a. Check the decompression system with the
camshaft sprocket and the decompression
cam installed to the camshaft.
b. Check that the decompression lever "1"
moves smoothly.
c. Without operating the decompression lever,
check that the decompression cam " ...
Adjusting the exhaust gas volume
NOTE:
Be sure to set the CO density level to standard,
and then adjust the exhaust gas volume.
1. Remove:
Rider seat
Refer to "GENERAL CHASSIS" on page 4-1.
2. Set the main switch to "OFF".
3. Disconnect:
Self-diagnosis signal connector "1"
4. Connect:
FI diagnostic tool "2 ...
Adjusting the valve clearance
The following procedure applies to all of the
valves.
NOTE:
Valve clearance adjustment should be made
on a cold engine, at room temperature.
When the valve clearance is to be measured or
adjusted, the piston must be at top dead center
(TDC) on the compression stroke.
1. Remove:
...