Here is a funny video of a heavily modified lawn tractor (motorcycle) with wheelie bars:
[ame=http://www.youtube.com/watch?v=CVkTyew_bC0&feature=related]130hp lawn mower - YouTube[/ame]
I was not planning on doing anything that elaborate when I replied with my "two" word suggestion.
My property also demands I make up a set of wheelie bars for my Husky ........ least I see sky when climbing up some of the short but steep slopes.
So I'm using the top leaf from a set of light-weight trailer leaf springs.
I'm cutting the eye end off at one end, and adding an axle through that eye at the other end with a set of 10" pneumatic tires/wheels on either side of the leaf.
I'll make an angle iron mount, that basically will be a squared off U.
The two top legs ends of the U will slide into slot-mounts bolted to the frame ahead of the rear wheels, and the bottom cross section of the U will have a hole that lines up with the tow hole on my tractor.
A section of angle bar will be welded/bolted across the top of the U so that just the slide-in projections of the U will extend beyond it, making it a square frame with tabs extending off the sides at each end.
The non-eye end of the leaf spring will bolt to the center of that cross member, and the leaf will have a hole that lines up with the hole in the bottom of the U (and consequently .... the tow hole in my tractor).
I'll use a cam-lock pin to go through the hole in the U and my tractor's tow hole to hold it in place, but a bolt would work as well.
Easy on, easy off.
I want to use a leaf spring because it has an easy axle mount, is strong, and has some give to it .
I'm not originally an American, but I've lived here long enough to learn some of that famous "Yankee Ingenuity" from you guys.