How do you tighten a chain on a 2001 Yamaha Warrior?

Don't know if this helps, but this is how you tighten a 750 years 90 - 96 Loosen the bearing holder pinch bolt, (hexagonal bolt on swing arm behind the chain on rear wheel.) Adjust the drive chain slack by turning the bearing holder using the pin spanner (a bit like a C peg spanner) and handle (included in the tool kit) the slack should be between 15-25mm Tighten the bearing holder pinch bolt. torque to 55Nm This is taken from the Honda service manual 90-96 VFR750F and worked on my FS (95)