thanks for the help its a 12 tooth pinion i work at tayracers model shop so can send stuff back very easily. they even have a square cut in the shell for fan they werent too bad when my workmates owned the cars as they raced them in a barn in wintertime series at csor. i usually boot them up and down carparks and they seem to blow up miby i should just use them on the track for 5 mins at a time and not till the lipo cutoff comes on
