The old boarboyz and cyboars are indeed a bit on the small side but they are great models (well, I like them anyways, might be nostalgia influenced though). The new fantasy boarboys have grown quite a bit so I don't think the size difference will be all too big with the bikes. Still not as big, but not Zomg
waac difference in size.
It's an awesome idea, boarboys for bikes and ogre big monsters for squiggoths/trucks