Yamaha YZF-R125 Service Manual: 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 minutes.
2. Remove:
- Rider seat Refer to "GENERAL CHASSIS" on page 4-1.
3. Lift the fuel tank. (Do not disconnect the fuel hose, fuel drain hose, and couplers.) Refer to "FUEL TANK" on page 7-1.
4. Install:
- Digital tachometer (onto the spark plug lead)
5. Check:
Engine idling speed
Out of specification → Adjust.
6. Remove:
- Right side panel Refer to "GENERAL CHASSIS" on page 4-1.
7. Adjust:
- Engine idling speed
a. Turn the pilot screw "1" in direction "a" or "b" until the specified engine idling speed is obtained.
8. Remove:
- Digital tachometer
9. Install:
- Fuel tank Refer to "FUEL TANK" on page 7-1.
- Right side panel
- Rider seat Refer to "GENERAL CHASSIS" on page 4-1.
10.Adjust:
- Throttle cable free play
Refer to "ADJUSTING THE THROTTLE CABLE
FREE PLAY" on page 3-6.
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" ...
Adjusting the throttle cable free play
NOTE:
Prior to adjusting the throttle cable free play, the
engine idling speed should be adjusted.
1. Check:
Throttle cable free play "a"
Out of specification →Adjust.
2. Remov ...
Other materials:
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 ...
Checking the front fork legs
The following procedure applies to both of the
front fork legs.
1. Check:
Inner tube
Outer tube
Bends/damage/scratches
Replace.
WARNINGDo not attempt to straighten a bent inner
tube as this may dangerously weaken it.
2. Measure:
Spring free length "a"
Out of sp ...
Removing the primary drive gear and balancer gears
1. Loosen:
Primary drive gear nut "1"
NOTE:
Place the aluminum plate "a" between the balancer
drive gear "2" and the balancer driven
gear "3", and then loosen the primary drive gear
nut.
2. Straighten the lock washer tab.
3. Loosen:
Balancer driven gear nut "1"
NOTE:
Place ...