got a 2005 renegade sdi 600. this is my first skidoo and dont kno much yet. went riding the other day and was getting very low rpms. i was told to move your clickers in your clutch up if your not hitting 8000-8400 rpms. so i kept moving it up as i rode and i ended up getting all the way to 6 on my clickers and it was still only pullin 7500 rpms up top on the flats. what do i need to do? i need it set up for 6000-9000 feet in elevation. change my weights???