Single-Cylinder Websites
JPX Aircraft Engines - R'Tec Magnesium Aluminium foundry
JPX manufacturer 2/4 stroke engines for aviation, paramotor (D160-D330); R'Tec Research technologies Aluminium Magnesium foundry, JPX manufacturier moteurs 2/4 temps pour aviation, paramoteur (D160-D330)
Diamond Generators, Agra  Manufacturer of Diesel Engine and Generato
Diamond generator manufacture diesel engine, generators, diesel pump sets and altenators in Agra,India. We manufacture air cooled and water cooled engines.
Yamaha Premium Gasoline Engines, quality, dependable, Yamaha
Yamaha Premium Gasoline Engines, quality, dependable, reliable, general purpose engines distributed by Yamaha Motor Corporation, USA
Old Marine Engine
A resource for the antique inboard marine ethusiast. Discussion, research, and classified related to pre-1940 inboard marine engines. Photos and information on old marine engines.
Classic Norton Engineering Specialists
Complete one stop shop for engineering solutions for all makes of classic motorcycles.