Suzuki DR 125 Service Manual page 40

3-4 ENGINE
• Remove the gearshift cam lever.
• Loosen the rear axle nut 1 and chain adjuster nuts 2 (left
and right). Make sure that the drive chain has enough slack.
• Remove the engine sprocket 3.
NOTE:
When loosening the engine sprocket bolt, depress the brake
pedal.
• Remove the clutch release arm 4 along with the clutch cable.
• Disconnect the crankcase breather hose 5.
• Disconnect the generator lead wire coupler 6 and pick-up
coil lead wire coupler 7.