Have 1/6 bike kits on eBay now if anybody is look for one. You'll need a donor 1/6 scale motorbike model for the wheels, forks and so on.
1 by Sky Net, on Flickr
3 by Sky Net, on Flickr
2 by Sky Net, on Flickr
4 by Sky Net, on Flickr
5 by Sky Net, on Flickr