Yamaha YZF-R125 Service Manual: 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. Remove:
- Right side panel Refer to "GENERAL CHASSIS" on page 4-1.
3. Adjust:
- Throttle cable free play
a. Loosen the locknut "1" on the accelerator cable.
b. Turn the adjusting nut "2" in direction "a" or "b" until the specified throttle cable free play is obtained.
c. Tighten the locknut. 
NOTE:
If the specified throttle cable free play cannot be obtained on the throttle body end of the cable, use the adjusting nut on the handlebar end.
a. Slide back the rubber cover "1".
b. Loosen the locknut "2".
c. Turn the adjusting nut "3" in direction "a" or "b" until the specified throttle cable free play is obtained.
d. Tighten the locknut.
e. Slide the rubber cover to its original position.
| WARNING After adjusting the throttle cable free play, start the engine and turn the handlebar to the right or left to ensure that this does not cause the engine idling speed to change. |
4. Install:
- Right side panel Refer to "GENERAL CHASSIS" on page 4-1.
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 ...
Checking the spark plug
1. Remove:
Right side cover
Refer to "GENERAL CHASSIS" on page 4-1.
2. Disconnect:
Spark plug cap
3. Remove:
Spark plug
CAUTION:Before removing the spark plug, blow away
...
Other materials:
Circuit diagram
2. Crankshaft position sensor
4. Main fuse
5. Main switch
6. Radiator fan motor fuse
8. Sidestand switch
9. Battery
17.Engine stop switch
19.Intake air pressure sensor
20.Intake air temperature sensor
21.Throttle position sensor
22.Coolant temperature sensor
23.Lean angle sensor
24.S ...
Cleaning and lubricating the drive chain
The drive chain must be cleaned and
lubricated at the intervals specified in
the periodic maintenance and lubrication
chart, otherwise it will quickly wear
out, especially when riding in dusty or
wet areas. Service the drive chain as
follows.
NOTICE
The drive chain must be lubricated
...
Checking the spark plug
The spark plug is an important engine
component, which is easy to check.
Since heat and deposits will cause any
spark plug to slowly erode, the spark
plug should be removed and checked
in accordance with the periodic maintenance
and lubrication chart. In addition,
the condition of the ...