1.5d in an lst2 is a retaded idea rofl no way it can take it on 6s..Im doing the same to my emaxx (close to same weight) I can fit 62/25 with 1/8th gears on my 1.5d on 6s and thats about 55mph maxed LOL... I dont like that motor, I hope it blows up. Ive seen Stumblin roll his revo 70mph on a 1.5d on 6s but it didnt live alot longer