Yamaha YZF-R125 Service Manual: Removing the fuel tank
1. Extract the fuel in the fuel tank through the fuel tank filler hole with a pump.
2. Remove:
- Fuel hose connector cover "1"
3. Disconnect:
- Fuel hose "2"
CAUTION:
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NOTE:
Before removing the hose, place a few rags in the area under where it will be removed.
4. Remove:
- Fuel tank
Checking the fuel pump body
1. Check:
Fuel pump body
Obstruction 
Clean.
Cracks/damage
Replace the fuel tank.
Fuel tank
...
Installing the fuel hose
1. Install:
Fuel hose
Fuel hose connector cover
CAUTION:When installing the fuel hose, make sure
that
it is securely connected, and that the fuel
hose connector cover is in t ...
Other materials:
Ecu self-diagnostic function
The ECU is equipped with a self-diagnostic function in order to ensure that
the fuel injection system is
operating normally. If this function detects a malfunction in the system, it
immediately operates the engine
under substitute characteristics and illuminates the engine trouble warning
li ...
Adjusting the engine idling speed
The engine idling speed must be
checked and, if necessary, adjusted as
follows at the intervals specified in the
periodic maintenance and lubrication
chart.
The engine should be warm before
making this adjustment.
Remove panel A.
Check the engine idling speed
and, if necessary, ...
Checking the condition of the bulbs
The following procedure applies to all of the
bulbs.
1. Remove:
Bulb
WARNINGSince the headlight bulbs get extremely
hot,
keep flammable products and your hands
away from them until they have cooled
down.
CAUTION:
Be sure to hold the socket firmly when re ...