Yamaha YZF-R125 Service Manual: Shift shaft

Installing the oil pump

1. Install: Oil pump assembly CAUTION:After tightening the screws, make sure the oil pump turns smoothly. ...

Checking the shift shaft

1. Check: Shift shaft Bends/damage/wear Replace. Shift shaft spring Damage/wear Replace. Checking the stopper lever 1. Check: Stopper lever Bends/damage Replace. Roller ...

Other materials:

Checking the thermostat
1. Check: Thermostat Does not open at 80.5-83.5 C (176.9-182.3 F)  Replace. a. Suspend the thermostat "1" in a container "2" filled with water. b. Slowly heat the water "3". c. Place a thermometer "4" in the water. d. While stirring the water, observe the thermostat and th ...

Checking the starter clutch
1. Check: Starter clutch rollers "1" Starter clutch spring caps "2" Starter clutch springs "3" Damage/wear Replace the starter clutch assembly. 2. Check: Starter clutch idle gear Starter clutch gear Burrs/chips/roughness/wear Replace the defective part(s). 3. Check: ...

Assembling the front fork legs
The following procedure applies to both of the front fork legs. WARNING Make sure the oil levels in both front fork legs are equal. Uneven oil levels can result in poor handling and a loss of stability. NOTE: When assembling the front fork leg, be sure to rep ...