Had my 4rt since August. I ride most weekends and practice when i can. To date i've put Hebo footrests on and bought a spare air filter changed oil and filter and gaskets and o rings, standard service items. My results have improved beyond my wildest dreams and i still smile every time i ride it. Have to agree on slippery banks once you forget its a 4 stroke your doomed but if you get your weight right back and be smooth with the throttle it'll find grip anywhere.
I wouldn't have anything else first bike i've owned that has all the steel bolts going into aluninium housings greased before i got it home. Gas Gas should do that to their front caliper mounting bolts. I'm off to buy a new rear tyre