It's pretty obscure from the early-mid 70's, built by Sepp Schloegl, Alfons Zender Mang and Anton Mang called a SMZ 250. Anton Mang managed a 6th place on it at the 1975 Austrian GP. This was in the 350 class although all references I have seen to the bike have it as a 250. In those days though it wasn't unheard of for 250's to be raced in the 350 class and 350's in the 500.
You rotten low-down! May you be consigned to ride clapped-out Vespas! A 'one-off'!!! And a rare one, if it still exists... I should have suspected! I knew it was 'European' but could not get any leads to go on...Dieter Braun had his hands in this too...I must wonder if somehow any Suzuki-engineered stuff was incorporated....
Sorry chaps Yes it was homebuilt. Sometimes I think that racing was a bit more interesting back then due to the fact that there were these homebuilt machines around along with variations of over the counter racing racing bikes. When you think that a company like Morbidelli, who were a woodworking firm produced world championship winning bikes and Pernod, the drinks company, provided the finance for a GP winning 250 things don't seem quite as exciting now. There were lots of very good tuners around with some very interesting ideas, it's a shame that the two strokes have been thrown to one side as in reality they are cheaper to build than a four stroke.
Here's another, this engine was also briefly used in a solo ridden by a world champion. Uploaded with ImageShack.us
This one's a gimme: Newcomb's bike shows up earlier in this thread. Interesting, one photo has engine with transverse crank and Norton gearbox, t'other had crank inline with a ??? gearbox
Waay too many clues on this one. Wasn't it also a key part in the formation of a certain American V-Twin manufacturor?
It has nothing to do Kim Newcombe, totally different engine. Looks like a BMW gearbox, which actually does give a link to Newcombe as he did some development work for BMW using the Konig engine in a BMW frame with the flat twins transmission.
Silver Dream Racer! Barton Phoenix. The engine was used fairly successfully in sidecar outfits particularly by Nigel Rollason who I think may have won a TT using one.
Hi Robin, Of course, you are correct. As mentioned by "AHRMA_581", this is also what powered Eric Buell's first race bike. Don