hey mate you try going super fat on the motor like five turns out on the bottom,six on the top dont touch the needle on the back of the motor opposite the low jet and work them in slowly top end first then bottom then idle,make sure your clutch is set up properly,thats a starting point hope it helps,take your time dont rush the tuning teach yourself give the adjustments time to react before making more changes at first you may need to turn a couple of hours on the top needle then go to one hour changes do the same on the bottom also try here http://www.rctech.net/forum/nitro-of...ble.html.enjoy