What year did the RG250 first come out?

[F5 Dave]

And so are the front, the uppers are just covers, there are tubes under them in conventional manner.

However. . . , now I think of it the Honda Nifty 50 scooters did have USDs
http://en.wikipedia.org/wiki/Honda_Spree

but they were 1985 too, so my original answer stands.

[onearmedbandit]

I forgot to the add the bit about 'mass produced sportsbike' until post #18.

[McWild]

Fail. The rear shocks are the right way up.

I prefer to think that the engineers just got bored and slapped on a miniature pair of the front forks.

Hence there are USD front forks on the back.

[avgas]

Some interesting stuff, why has it stopped? Who can tell me the displacement of the rear cylinder on an MVX250? Including the bore and stroke comparisons.

More than the rear cylinder of a LE Velocette.....but that didn't have a spark plug

[F5 Dave]

I prefer to think that the engineers just got bored and slapped on a miniature pair of the front forks.

. . . .

WHICH ARE NOT USD FORKS.

Shessh, ewe'll turn me into Winja.

[imdying]

Here's me thinking of posting "Uhh, and what of Dave's post then Andrew?"

[McWild]

Oh my god, I'm sorry!

I just realised that I accidentally posted the picture the wrong way round.

Here is the actual photo.

As you can see the YB100's suspension is indeed of the upside down variety. I hope this clears up any confusion I caused.