Welcome to Librarium Online!
I want to put a warboss on a warbike, and thats obviously going to take some converting and i just wanted to pick up on what people might have done, or ideas they have.
I built my biker boss using a number of things I had lying around. For the warboss himself I used, big surprise, the metal warboss model with the chainaxe. The axe itself was cut off and I twisted his hand to make the haft into a handlebar. I also had to cut off the loincloth he was wearing and bend his legs so they would sit properly on the bike. (I also replace his shoota with a powerklaw)
The bike itself was fairly simple, I took two space marine bikes, trimmed a bit off the side and stuck them together to make a massive 4 wheeled monstrosity fit for a warboss.
I actually should be able to get some pics up at some point to give you a better idea.
Gargrimz Green Deff
W:10 D:4 L:5