Suzuki RM125 Owner's Service Manual page 70

ENGINE REMOVAL AND INSTALLATION 5-5
• Disconnect the magneto lead wire coupler 9 and clamp.
• Unclamp the magneto lead wire and breathers hoses from the
frame.
• Remove the drive chain by removing the clip 0.
• Remove the cotter pins A.
• Remove the brake pedal.
• Remove the sprocket cover B.
• Remove the magneto cover C.