id like to put a yz250 motor into my spare banshee roller just for kicks, apparently it was quite a common conversion for mofos that wanted to race the 250 class on a yammy back in the day, but fucked if i can find much about them, i doubt they were very competitive
there is ONE vid on youtube i found and it seems to hang ok with a trx450, hell it looked a bit faster to me in a roll on drag race