any suggestions for better ges milage on my 99 polaris 600 xc,need better performance for it too because top end in only 90 to 95 on the speedo, thanks

Depend on what your driving on....i find really deep snow like i run on most of the time kils my wallet in gas...while hard packed is great.
by the way i have a 2003 polaris 550 so its a little different...

the snow makes all the diff. the first of the year there was alot of hard pac. I would get 10mpg. now all the snow is real deep and heavy. I gat about 4-5 mpg today while I was breaking new trails and rebreaking the old ones.