I've seen that on Craigslist here before. It's interesting but not too practical. On the way to NASSIR we met a Danish guy riding a Ural with a Kubota tractor engine. It was pretty home rigged but ran. He ran on Wesson oil some of the time. Not really fast enough for the slab but a great job of backyard engineering. We invited him to NASSIR and he showed up there. I think John stored his bike for awhile in AZ.