Ok. I went to sand mountain on pres day and had a great time with the new 450. For the sand I set the bike up with a 13 tooth front and 49 tooth rear sprocket. I also used the AMS sand snake mx rear tire with a 10 paddle. Every single quad I race would beat off the line and by the first set of whoops on comp hill I would be back by 2-3 bike lengths but I could usually gain on the banshees and 450s and beat them by 3-4 bike lengths at the very top. BUT the problem is I cant pull fourth gear all the way up. By a little bit after 1/2 way I would have to downshift and scream the 450 the rest of way, which is fine, but I was wonderin if I got a yz pipe for or somethin else and got the jetting right (a little lean up there), could I pull 4th? What kind of gearing and tires do you guys use?