Kevin Schwantz his Lucky Strike RGV500 seen at the Classic GP at the TT circuit Assen September 2023. For more pics see
The Dick de Jager 500cc four cylinder boxer two stroke is a very rare beast. As far as I know there exists only one engine. The König crankcases are known for weak casting and prone to crack. So de Jager decided to make a beter crankcase, the barrels are from Yamaha and the crank is a modified König one. The engine delivers 111 hp. Owner Luc de Smet from Belgium still races it at classic meetings with his female teammate Zoë Beun.
The very special JPR Roland DKW 750 two stroke triple sidecar as raced by Jon Perkins and Ian Nickels in the Camathias cup. This is one of the very few two strokes that races in the Camathias cup as two strokes after 1967 are not allowed. It is one of the fastest sidecars of the field. The engine is a heavily modified Roland DKW Junior 750 triple, it uses reedvalve inlets, Mikuni carbs, Yamaha YZ250 pistons and a Hemmings racing transmission.
Stumbled across some pics on the interweb of a very strange and special bike. Two Honda NSR250 engines crafted together in a Suzuki GSXR400 frame by the Hamada brothers.
I found a very nice article on the interweb with lots of facts and trivia about the Suzuki RG500 and its riders.