Both of the carbs are leaking out of the overflow on my Banshee even when it is just sitting with the gas turned on, it leaves a nice puddle on the driveway. any help would be appreciated.

97 Banshee

 

This may be an obvious solution, but have you checked the float levels? Of course, turning off the petcocks would solve the problem. Most manufacturers recommend that anyway, Altho I have never had a bike or quad that overflowed the bowl & I never turn the fuel off unless I'm working on the bike in that area.
Another item you might check is the spring-loaded
float needle valve that your float tangs rest on. They often become stuck with small impurities in the fuel & fail to shut off the flow.

 

Another possibility is that the needle/seat assemblies in your carbs need replacing. You might want to check them out.

 

mine was doing the same thing once in awhile.

i just took the carbs off and cleaned them really well and never had the problem again. but yours may have a different problem then mine did.