Yamaha YZF-R125 Service Manual: 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"
5. While pressing the "MODE" button "1", turn the main switch to "ON".
NOTE:
- "DIAG" appears on the LCD "2" of the FI diagnostic tool.
- "POWER" LED (Green) "3" comes on.
6. Press the "UP" button "4" to select the CO adjustment mode "CO" or the diagnostic mode "DIAG".
7. After selecting "CO", press the "MODE" button.
8. Check that "C1" appears on the LCD of the FI diagnostic tool, and then press the "MODE" button.
9. Start the engine.
| CAUTION: Perform the adjustment after the battery has been sufficiently charged. |
10.Change the CO adjustment volume by pressing the "UP" and "DOWN" buttons.
NOTE:
The CO adjustment volume and engine idling speed appears on the LCD of the FI diagnostic tool.
- To decrease the CO adjustment volume, press the "DOWN" button.
- To increase the CO adjustment volume, press the "UP" button.
11.Release the "DOWN" and "UP" buttons to execute the selection.
12.Set the main switch to "OFF" to cancel the mode.
13.Disconnect:
- FI diagnostic tool
14.Connect:
- Self-diagnosis signal connector
15.Install:
- Rider seat Refer to "GENERAL CHASSIS" on page 4-1.
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
a ...
Adjusting the engine idling speed
NOTE:
Prior to adjusting the engine idling speed, the air
filter element should be clean, and the engine
should have adequate compression.
1. Start the engine and let it warm up for several
minut ...
Other materials:
Checking the crankshaft
1. Measure:
Crankshaft runout
Out of specification Replace
the crankshaft,
bearing or both.
NOTE:
Turn the crankshaft slowly.
2. Measure:
Big end side clearance
Out of specification Replace
the crankshaft.
3. Measure:
Crankshaft width
Out of specification&nbs ...
Installing the camshaft and rocker arms
1. Lubricate:
Rocker arms
Rocker arm shafts
2. Lubricate:
Camshaft
3. Install:
Camshaft "1"
NOTE:
Make sure that the camshaft projections "a" and
hole "b" are positioned as shown in the illustration.
4. Install:
Rocker arms
Rocker arm shafts "1"
NOTE:
Make ...
Ignition circuit cut-off system
The ignition circuit cut-off system (comprising
the sidestand switch, clutch
switch and neutral switch) has the following
functions.
It prevents starting when the transmission
is in gear and the sidestand
is up, but the clutch lever is
not pulled.
It prevents starting when the t ...