try the guys at the link below, there's not a lot of bikers on this forum.

http://www.rcgroups.com/motorcycles-183/

but i know you can swap it for any small block engine, ie a .12, .15 or .18 as long as you can fit the head in. it's been done before. i know Novarossi make an engine specifically for nitro bikes, but there website regarding them is still under construction.


http://www.novarossi.it/products/eng...ex-onroad.html