Stels 061 in standard form. Chris Murphy photos.
This was a light weight engine that shared many of the design features of the Stels 049. Relatively small numbers were produced before the factory was closed down following problems with the Russian Mafia. They were nice though fragile engines. Most failed when the crank pin sheared off the crankshaft. A radial mount that replaced the screw-in backplate was supplied as standard. Unlike the 049, which was designed to use Cox TeeDee heads, this engine used a special glow button head and a clamp ring.
Like all Stels engines, they are no longer available. Those that owned them said they would run at around 25-26K on an APC 5.5 x 2 with unspecified fuel.