As you might be able to guess from the name, Flexit sidecars were designed to lean with the motorcycle, yielding much better handling characteristics than a traditional sidecar rig. Approximately 167 were built between 1981 and 2005, making this a rare and interesting take on 3-wheeling.
The Flexit can be hooked up on either the left or right side and is capable of leaning 35 degrees in either direction. You’ll also get a disc brake, air shocks with onboard compressor, and an electric sliding canopy – not bad! For more information on (and a whole lot more photos of) this interesting rig, check out this site.

Factory brochure cover, photo from http://www.improvelife.info/links/bikes/flexit.htm#5
Unfortunately, there isn’t much information given about this specific rig for sale in Australia, though the seller does have a video of the hack moving around at slow speeds:
Find this rare hack for sale in Londonderry, NSW, Australia for $4,689 here at Old Gold Motorcycles.
This bike-uriousity brought to you by Zack B!