I had a 2003 Grizzly with 26 Gators and I broke 3 ft axles,broke a rr axle and blew out the seal.It always overheated,and it had a recall for fuel boiling/overheat deal,they rejetted it,put a heat shield under the gas tank,put new side panels to cool down engine.It didn't fix a thing,then I bent 2 lower control arms in the ft from tiny cypress knee's.After all of that I then broke the ft inner joint on the drive shaft,that caused the seal to leak and it then stripped the splines inside the engine.In 8 months of owning that 660,it was in the shop for 5 and half months.I sold that and bought the 04 450ES and ran 28 Mudzilla's with a lift kit and had progressive lift shocks at the same time and never broke 1 thing in a years time.MY 2 buddies still have there's and are still breaking Gorrilla axles in the rear and always clogg up the radiator and clutch baskets for the belt,they're running 27 Bi and Tri Claws.Yamaha makes excellent engines but the drivetrain can't handle it.I personally would't rec the Grizzly to anyone that rides in water and mud climates(MY OPINOIN ONLY)...