Yamaha YZF-R125 Service Manual: Periodic checks and adjustments
- Periodic maintenance
- Engine
- Adjusting the valve clearance
- Adjusting the exhaust gas volume
- Adjusting the engine idling speed
- Adjusting the throttle cable free play
- Checking the spark plug
- Checking the ignition timing
- Measuring the compression pressure
- Checking the engine oil level
- Changing the engine oil
- Adjusting the clutch cable free play
- Cleaning the air filter element
- Checking the throttle body joint and air filter case joint
- Checking the fuel line
- Checking the cylinder head breather hose
- Checking the exhaust system
- Checking the coolant level
- Checking the cooling system
- Changing the coolant
- Chassis
- Adjusting the rear disc brake
- Checking the brake fluid level
- Checking the front brake pads
- Checking the rear brake pads
- Checking the front brake hose
- Checking the rear brake hose
- Bleeding the hydraulic brake system
- Adjusting the drive chain slack
- Lubricating the drive chain
- Checking and adjusting the steering head
- Checking the front fork
- Checking the tires
- Checking the wheels
- Checking and lubricating the cables
- Electrical system
Cable routing
Front brake light switch lead
Right handlebar switch lead
Throttle cable
Main switch
Clutch cable
Clutch switch lead
Left handlebar switch lead
Sub-wire harness
Horn
Speed sen ...
Other materials:
Intake air pressure sensor
1. Check:
Intake air pressure sensor output voltage
Out of specification Replace the throttle
body.
a. Connect the pocket tester (DC 20 V) to the
throttle body sensor assembly coupler as
shown.
Positive tester probe
pink/white "1"
Negative tester probe
gray/black "2"
...
Adjusting the drive chain slack
NOTE:
The drive chain slack must be checked at the
tightest point on the chain.
CAUTION:A drive chain that is too tight will
overload
the engine and other vital parts, and one that
is too loose can skip and damage the swingarm
or cause an accident. Therefore, keep
the drive ...
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 ...