As the poster of the IRS thread this is all very interesting stuff and exactly what i was looking for as far as advice is concerned.
I just bought a can of high pressure adhesive lubricant on the weekend (a Wurths product can't remember the name) It's supposed to be used for hinges etc and i reckon that would work really well as a tester for this problem.

By the way i also have changed my mind on the IRS idea. It was simply that and the comments and advice i've recieved have convinced me to go the twin link and panhard rod route for the time being.

The bloke i work with on the stuff thats past my skills also pointed out that an IRS setup was pretty heavy which would negate one of the 1200 (and 1000!) most endearing features; it's nimbleness due to it's light weight.
They're damn go-karts! Heaps of fun nipping through the traffic!

This Web site is a gold mine of ideas and advice! Can't get enough.