Cannondale ATV Owner's Manual page 80

Fuel tank removal/installation
The following procedure requires moderate mechanical
skill. If you doubt your skills or abilities to remove the fuel
tank safely, have the fuel tank serviced by an authorized
Cannondale motorsports dealer.
CAUTION
Inspect and lubricate with clean engine oil - each of
the quick connect hose end O-rings before
installing them into the tank fittings. Also, press in
the tabs on the tank fittings before inserting the
hose ends.
Follow the torque recommendation for the tank to
frame mounting bolts, over-tightening the tank
bolts will result in damage to the embedded
threaded inserts.
1. Make sure the fuel cap is tightened securely.
2. Remove the fuse, seat, rear fender, and cowl.
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3. Remove the bolts and subframe cross braces.
1. Bolt
2. Cross brace
4. Remove two (front sides of tank) tank mounting bolts
and gently lift up on the front of the fuel tank.