Hi i just got this truck from a hobby shop its a offroad stadium truck not a monster. does anyone have any experiance with these are they any good for racing with some hop up parts or r they good for a bit of a thrash around the track It has a force 15 in it??? also i just started to break in the engine an after putting it through 1/2 a tank i noticed that now when i pull the pull start hard and the engine turns over after the engine has stopped turning over i hear this spooling sound that i didnt hear before im not sure if its the clutch or the pullstart does anyone know wat it is? and im alos noticing a bit of oil seeping out of the drive shaft that goes in to the engine is this normal?

i also just noticed that my disc brake can slide back and forth but it doesnt sipn on its mount just moves back and forth also the rubber half of the muffler is splitting along the seam where the 2 halve of the rubber molds joing ill this affect anything