My 2 cents -
Banshee overheating is overrated. I ran my 2000 at Glamis for 4 seasons and it never overheated; fmf pipes, pro flow air filter (lid off), reeds, stock radiator, stock head, and 50/50 af/distilled water (prestone af) and 320 mains . If there is water on the pipes from the overflow it is normal. All Banshees do it. If it is gurgling, the impeller as many have mentioned is bad or you are running lean. Oh I believe the impeller is plastic. If you run it at low speeds or labor the motor at slow speeds for an extended time at temps ~ 90 degrees it may overheat.