will build anything…
Couldn`t he find a bigger engine.
Going for fuel economy!
Check this ‘video build’ of a custom mini chopper…
Looks great…and a true custom build!!! 
http://www.youtube.com/watch?v=K6_2tUvW1Cs&mode=related&search=
http://www.youtube.com/watch?v=mHTDaet2Sas&mode=related&search=
And he uses a Briggs and Stratton V-twin engine, similar to the one I saw in Charlotte, USA…:)
http://www.youtube.com/watch?v=DFNsX0upd68
http://www.youtube.com/watch?v=_MtlNNxbge0&mode=related&search=
Well the lightness of the engine will help it through the corners…
maybe not…