Before I got into cars, I was playing around with things with small engines. First, it was my go-kart. Then, it was a minibike. In Freshmen shop class, I rebuilt an ancient Ariens snowblower for one of the teachers who left it there as a project for us. But then, I got a car, and small engines went to the wayside. The most tinkering I did was maintenance to the lawnmower or other machines around the yard.
Until last year, that is.
Last spring, many of my friends who do various forms of racing started buying minibikes and "whizzer"-style converted pedal bikes. That smacked me upside the head with nostalgia for my old go-kart and minibike, so I bought a complete deathtrap at a shady swap meet. Here's a thread about it from last year. I hammered on the thing all summer, but couldn't get it right.
Yesterday, an ad for a minibike popped up locally, so I had to go check it out. And yeah, I bought it. It was St. Patrick's Day, so the green paint was PERFECT for the occasion. 
It's a Baja "Racer", which is a recent copy of the old Doodlebug bikes from what I understand. It sports an adorable little 97cc Chinese Briggs copy, and after adding fresh gas, it runs great! It needs the throttle return spring re-attached, the seat bolted back on, and air in the tires. It tends to drip some fuel out of somewhere, too. Apparently, these have a cult following, and they make a bunch of engine swap kits and performance parts for it. A HF Predator may be in its future!
My nephew will be taking possession of my old minibike, the REO ButtWagon, named for its ridiculous tractor seat.
I'll be posting more small engine'd stupidity in here. I also have a generator I've been working on that will end up in here as well.
