Front wheel tooth belt drive gas engine?

Is it possible to mount a 2 or 4 stroke engine with tooth belt drive on the front wheel of a bicycle?

 

ive not seen that, there are sysrems like bike bug that power a roller and someone on here trying to motorize a 2wd. good luck

 

http://www.motoredbikes.com/showpost.php?p=55854&postcount=1

 

i moved my gebe subaru to the front wheel of a trike, worked fine

 

stude13, do you have any issues with smelling exhaust or breathing exhaust with the motor on the front wheel?