Modell II/27
Developed from the Type I/26, the II/27 had the magneto positioned behind the cylinder, engine oil pump with sight glass, and engine power was increased to 18 hp.
The magneto of the JAP 600cc sidevalve engine had been repositioned behind the cylinder,
Modell I/27
In the same chassis was also the similar but considerably cheaper JAP roadster 550cc 14 HP engine, under the model name I/27.
The following season these became models I/28 and II/28, and were unchanged.
A Super-Sport-Modell III-28 with an OHV 500cc JAP was added. It delivered 22 P.S. and could achieve 130 k/ph.
