Yamaha YZF-R125 Service Manual: Generator and starter clutch

Installing the piston and cylinder

1. Install: Top ring "1" 2nd ring "2" Oil ring expander "3" Lower oil ring rail "4" Upper oil ring rail "5" NOTE: Be sure to install the piston rings so that the manufacturer marks or ...

Removing the generator

1. Remove: Generator rotor nut "1" Washer NOTE: While holding the generator rotor "2" with the sheave holder "3", loosen the generator rotor nut. Do not allow the sheave holder to t ...

Other materials:

Changing the coolant
1. Remove: Lower side cowlings Refer to "GENERAL CHASSIS" on page 4-1. 2. Remove: Radiator cap "1" WARNINGA hot radiator is under pressure. Therefore, do not remove the radiator cap when the engine is hot. Scalding hot fluid and steam may be blown out, which c ...

Checking the diode
1. Check: Diode Out of specification Replace. NOTE: The pocket tester or the analog pocket tester readings are shown in the following table. a. Disconnect the diode from the wire harness. b. Connect the pocket tester ( × 1) to the diode terminals as shown. c. Check the diod ...

Checking the speed sensor
1. Check: Speed sensor output voltage Out of specification → Replace. a. Connect the pocket tester (DC 20 V) to the speed sensor coupler (wire harness end) as shown. Positive tester probe gray "1" Negative tester probe gray/black "2" b. Set the main switch to "ON". c. ...