250 Sprint/drag special.

[breakwellmz]

You don`t see many of these! -

[Puffs]

Ta for that pic, and I might add: probably for a reason!

The leading link front end is odd, and it might even have a sidecar? Cannot see clearly. Big Bing, no air filter, extended rear end & swingarm. What's with the second pot I see on the other side?

Another MZ racer, this one with a headlight:

[breakwellmz]

No sidecar, no second pot, only one sparkplug. That`s the bumper of the car on the other side not a second exhaust.

[Puffs]

Well indeed, it's a single 250/300, but it could still have a split exhaust header, to breath into 2 expansion exhausts? Would be a great help in increasing the throughput of the header. With that pot I mean this thing:

2nd muffler on RH side.jpg (58.66 KiB) Viewed 2707 times

Which to me looks distinctly like a second muffler on the RH side, not a car bumper.
Btw, here's what seems to be the same bike, but now with a new header & that awkward LH expansion exhaust removed (which makes sense, as I guess it would burn your leg):

On it having a sidecar: see those square tyres, particularly the F one in your pic. Tyres like that will make normal riding difficult. Another indication is the handrail at the rear which, with a seat like that, can only be used by the monkey (= sidecarist). But I'm not sure as we haven’t' seen the RH side of the bike.

[mr_luke]

A bit of Googling using my best (not very good!) German threw this up:

https://www.facebook.com/photo.php?fbid=2456227724649721&id=1633952070210628&set=a.1633954450210390

[Puffs]

Thanks for that pic!

But the bike's too high for that, IMO. In the past, when the Moto GP class still allowed sidecars, those always were as low as possible. Low engines like the flat twin BMW were popular:

More modern, with a 4-in-line Fireblade engine:

Also, using a 250 or 300cc ETZ engine for that seems a poor choice - 40hp for 2 big boys? A tuned Fireblade will be in the 230hp range, I'd guess.

Anyway, to each his own. As an MX rider I detest sidecars, as they used to ruin the track.
And on a deeper level, that sidecar takes away an IMO very important aspect of bike riding: the balancing of the bike in the corner! It'll ride more like a car.