Judging by your photo, your going to need some shimming washers, and put them against the lock nut that goes over the collet on the crankshaft. This will push the bell assembly forward. You have alot of play between the clutchbell and the screw. The shims will push the clutch bell forward and clear the flywheel. By the looks of it, you will need 2 maybe three washers.

If your not sure what washers, get the Team Associated shim kit from amain hobbies. The washers fit perfectly on this engine.

Hopefully this helps.