What is the recommended range of drive chain slack for a standard underbone motorcycle, and where should this measurement be taken?

1. 20 mm to 30 mm, measured at the midpoint of the lower chain run between the front and rear sprockets.
2. 5 mm to 10 mm, measured directly underneath the rear sprocket.
3. 40 mm to 50 mm, measured at the top run of the chain near the swingarm pivot.
4. 10 mm to 15 mm, measured on the lower run while the rider is sitting on the motorcycle.