I had the Heads totally rebuilt (all new valves and 9 guides ect.)
I added a new Pro Systems Dominator. It took some jetting down to get it where it was happy with my motor but it seems great. I also added a new set of Used slicks 29.5x10.5W (I used to run the regular 29.5x10.5S tires.
These are the same except for 1" wider. It sure made a differance.
It was suck a blast riding a wheelie for that far. I know many people have went alot further but it was still great.