All types cars: July 2011

Sunday, July 31, 2011

Thursday, July 28, 2011

bentley cars wallpapers pictures

bentley cars wallpapers

bmw cars 2011

mini bikes best images and information

Like go-karts, the first minibikes were made by enthusiasts from spare parts found in their garages. They were first popularly used as "pit bikes", for drag racers to travel in the pits during races in the late 1950s. They were very useful for this purpose, as they could maneuver very well in the tight pit roads, fit in about the same space as a small bicycle in a trailer or pickup, and they were faster than most previous forms of transportation. As racers brought them home and used them around their neighborhoods, many children liked the idea of having a mini motorcycle and started building their own. A market for minibikes developed and many cottage and major industries developed to meet the demand. Minibike companies include Arctic-Cat, Rupp, Taco, Heath, Gilson, and Fox, many of which also made other power toys such as go-karts, trikes and choppers. The peak of the minibike/go-kart era was from the late 1960s to the early 1970s in America. Many of the brands, foremost Rupp, have gained a cult-following of enthusiasts and owners.
Early minibike power train
These early minibikes usually had of a power train with a small four-stroke, horizontal crankshaft, flathead engine. The transmission usually was of a crank-mounted centrifugal clutch and chain drive to a rear sprocket. As the minibike and the mini-powersports field grew, Comet introduced a continuously variable transmission, much like a snowmobile's, called the Torque-a-Verter, which automatically adjusts gear ratios, resulting in better top speed and acceleration.