Tested the air box today no jeting change from no box to this box then it all went down hill  I hit some trails rode for about 20 min every thing was going great I got home so I desided to open it up on the road took it up the road probly hit close to 100mph turned it around to go home I open it up again fast as it would go then the rear wheels lock up running probly 100mph I nearly lost it I stil havnt looked at it Im afraid to see what it going to cost to fix  let do the gessing game