No matter which atv model you have - take a look and measure your inside diameter for your swing arm. Salvage motorcycle yards in your area would have one somewhere - but the cruisers are shaft drive, too. If you take a look at some of the swingarm assemblies online - it'd definitely work - and worst case? A little bit of alteration - and if you keep your eyes on the like the Yamaha street cruiser swingarms - just a small drive shaft there in between engine and final driven gear - easily modified at any shop that makes or alters driveshafts/welders. These pics are from a 2002 Yamaha 1100 and a 2002 Yamaha Big Bear 400. If you look for a rear assembly your year and manufacturer odds are some of the parts will even be the same.
This is from the 1100
This is from the Big Bear
Middle Drive Gear for the 1100:
Middle Drive Gear for the Big Bear:
And here's what the swingarm and wheel assembly look like for the 1100:
It's doable. My dad took a 69 or 70 Volkswagen Beetle, cut it up, took the front half of the front fender and the back half of each back fender, combined them and on each side was a long fender with a headlight. He didn't want it to be a beetle so he called it the widow and painted the red hourglass on the back. The front end? That's the front bottom of a hull from an old jet ski. Foot clutch, shifter in the middle, electric mirrors, stereo, new pipes, Two seater and a paint job later -
Won best homemade or trike, etc. everywhere he went. Had no choice but to put the wheelie bar on it'd come up 18 inches if you popped the clutch. Sold it for just under $10k to a guy from Indiana who was down here for the Turkey Rod Run Antique Car Show in Daytona at the speedway they do every year. Saw it. Went home. Called my dad a few days later. Week's time he was loading it onto a trailer and hauling it back. I'd really appreciate seeing a picture if you get yours together. All The Best, Justin Lee, 17 South Industries, LLC