WINDHOFF 4 – year 1927
Manufacturer: Hans Windhoff Motorenbau, Berlin-Johanisthal, Germany
When in 1924 of the year, the first Windhoff motorcycle appeared, the company was already known to automotive supporters for the production of automotive radiators. So it is not surprising, that the company's first bikes had water-cooled engines. They were two-stroke engines with a displacement 124 cm3 i 174 cm3, equipped with a piston compressor of the Bekamo system.
W 1927 of the year, the Berlin company of Eng. Hans Windhoff moved from Bulowstrasse to Johanisthal. The most interesting Windhoff structure was built here, famous model 4, with a four-cylinder, in-line engine, oil cooled. The originality of the design was based on the unprecedented treatment of the engine and gearbox as a load-bearing element (the motorcycle had virtually no frame). Engine, with displacement 746 cm3 (cylinder diameter 63 mm, piston stroke 60 mm), gaining power 16 kW (22 KM) at 4000 rpm. The vertical plane of the aluminum engine block was richly ribbed, for better cooling. The crankshaft was supported on three bearings. The cylinder head was removable. Overhead valve timing, with a shaft in the head. The head casting also served as the supporting part for the saddle, fuel tank and front fork. The engine was cooled by oil - which also lubricated it - flowing between the cylinder liners and the engine walls. The Bosch spark igniter had an adjustable ignition timing. Drive to the rear wheel was transmitted via a dry disc clutch, three-speed gearbox (with manual control) and a shaft with cardan joints. Both wheels are equipped with brakes (the front wheel has a jaw). The front suspension had two leaf springs with a shock absorber. Windhoff 4 was considered an economical motorcycle - on 100 kilometers were enough for him 4 liters of fuel i 1/4 kg of oil. At empty weight 175 kg was developing a maximum speed 130 km/h. Costed 1950 marek.
During the beginning of the economic crisis, the Windhoff label began offering motorcycles with a Villiers two-stroke engine, with displacement 198 cm3 i 298 cm3. Strong competition from other companies, e.g.. DKW, However, the NSU or the Zundapp forced Windhoff to give up the production of motorcycles in 1933 year.