its baffled in side the tank so you dont have the fuel shwishing around so much . the only time its really noticeable is going in on a whooped out trail on a full tank or comming out on whoops on an empty tank. its not bad though though considering the 80 pound plus diffrent from full to empty . As for the tank leaking i dont think any one has had a tank leak , i was worried about it breaking after a crash but after seeing the abuse paul puts his machines though im not to worried any more