chain drive
121Timing belt — For other belts, see Belt (disambiguation). Timing belt Timi …
122Cogset — A freehub (above) for use with a cassette and a threaded hub (below) for use with a freewheel. On a bicycle, the cogset or cluster[1] is the set of multiple rear sprockets that attaches to the hub on the rear wheel. A cogset works with a rear… …
123Motorcycle engine — A Honda Super Cub engine. The most popular motorcycle in history, with over 60 million produced …
124History of BMW motorcycles — BMW s motorcycle history began in 1921 when BMW commenced manufacturing engines for other companies. The motorcycle subsidiary now operates under the BMW Motorrad division. BMW (Bayerische Motoren Werke AG) introduced the first motorcycle under… …
125Transfer case — A transfer case is a part of a four wheel drive system found in four wheel drive and all wheel drive vehicles. The transfer case is connected to the transmission and also to the front and rear axles by means of driveshafts. It is also referred to …
126Differential (mechanical device) — For other uses, see Differential. A cutaway view of an automotive final drive unit which contains the differential Input …
127History of the bicycle — Vehicles for human transport that have two wheels and require balancing by the rider date back to the early 19th century. The first means of transport making use of two wheels, and thus the archetype of the bicycle, was the German draisine dating …
128DB Class Köf III — DB Series III Köf / DBAG Class 331,332,333,335 Builder Gmeinder, Jung, Orenstein Koppel, Windhoff UIC classification B Gauge 1,435 mm (4 ft  …
