Yamaha YZF-R125 Service Manual: Replacing the headlight bulbs
The following procedure applies to the low beam headlight bulb.
1. Remove:
- Headlight bulb cover "1"
2. Remove:
- Headlight bulb holder "1"
3. Remove:
- Headlight bulb "1"
| WARNING Since the headlight bulb gets extremely hot, keep flammable products and your hands away from the bulb until it has cooled down. |
4. Install:
- Headlight bulb
Secure the new headlight bulb with the headlight bulb holder.
| CAUTION: Avoid touching the glass part of the headlight bulb to keep it free from oil, otherwise the transparency of the glass, the life of the bulb and the luminous flux will be adversely affected. If the headlight bulb gets soiled, thoroughly clean it with a cloth moistened with alcohol or lacquer thinner. |
5. Install:
- Headlight bulb holder
6. Install:
- Headlight bulb cover
The following procedure applies to the high beam headlight bulb.
1. Remove:
- Headlight bulb cover "1"
2. Disconnect:
- Headlight coupler "1"
3. Remove:
- Headlight bulb holder "1"
4. Remove:
- Headlight bulb "1"
| WARNING Since the headlight bulb gets extremely hot, keep flammable products and your hands away from the bulb until it has cooled down. |
5. Install:
Headlight bulb 
Secure the new headlight bulb with the headlight
bulb holder.
| CAUTION: Avoid touching the glass part of the headlight bulb to keep it free from oil, otherwise the transparency of the glass, the life of the bulb and the luminous flux will be adversely affected. If the headlight bulb gets soiled, thoroughly clean it with a cloth moistened with alcohol or lacquer thinner. |
6. Install:
- Headlight bulb holder
7. Connect:
- Headlight coupler
8. Install:
- Headlight bulb cover
Electrical system
Checking and charging the battery
Refer to "ELECTRICAL COMPONENTS" on
page 8-57.
Checking the fuses
Refer to "ELECTRICAL COMPONENTS" on
page 8-57. ...
Adjusting the headlight beams
The following procedure applies to both of the
headlights.
1. Adjust:
Headlight beam (vertically)
a. Turn the adjusting screw "1" in direction "a" or
"b".
A. Left headlight
B. Right he ...
Other materials:
Installing the shift forks and shift drum assembly
1. Install:
Shift fork-L "1"
Shift fork-C "2"
Shift fork-R "3"
Shift drum assembly "4"
Springs
Shift fork guide bar "5"
NOTE:
The embossed marks on the shift forks should
face towards the right side of the engine and be
in the following sequence: "R", "C", "L".
2. Check:
Tr ...
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:
...
General maintenance and lubrication chart
TIP
The air filter needs more frequent service if you are riding in
unusually wet or dusty areas.
Hydraulic brake service
Regularly check and, if necessary, correct the brake fluid level.
Every two years change the brake fluid.
Replace the brake hoses every four ye ...