Here's what happens when you combine an old chain saw or weed eater engine with way too much free time. My wife and I rode out to an antique farm tractor show today and spotted these guys, the 1 on the right has 4 weed eater engines and the 1 on the left that's been cut off by the photo has 3. Some that were running just 1 big chain saw engine would have dual carbs. Absolutely nuts but incredibly fun to watch.