Direct injection on the two strokes is whats needed. I heard rumors of KTM doing it in 2014 but just assumed it would be on the current enduro bikes. There is some fun tech for sure on the bike but they're having issues with just FI on some of their dirt bikes. This seems a looooong jump for them tech wise. Though hats off to them for progressing with new tech if it comes about. I've never seen mag wheels survive on a dirt bike yet and not sure of any benefits. 235 poounds dry is a bit porky considering their current 200 cc enduro bikes are 209 pounds.
:LOLI had to google that.......[h=1]What does "Mag" mean in reference to BMX wheels?[/h]The earliest modern lightweight automobile racing wheels were made of magnesium alloy and were called "mags." Now, anything that remotely resembles them is called a mag, whether it is made of aluminum (usually), plastic, or whatever. It's now just a slang for a wheel type -- one that is neither disk nor conventional spoke -- and not a reference to the material.A rose by any other name ??
Now I think about it.. Why are BMX wheels called mag wheels ?? they are not made of magnesium ??
The benefits of direct injection are even more pronounced in two-stroke engines, because it eliminates much of the pollution they cause. In conventional two-strokes, the exhaust and intake ports are both open at the same time, at the bottom of the piston stroke. A large portion of the fuel/air mixture entering the cylinder from the crankcase through the intake ports goes directly out, unburned, through the exhaust port. With direct injection, only air comes from the crankcase, and fuel is not injected until the piston rises and all ports are closed.
Some Goliath two stroke cars built in the early 1950s had direct injection, but their engines were soon superseded by four strokes.
Two types of GDi are used in two-strokes: low-pressure air-assisted, and high-pressure. The former, developed by Orbital Engine Corporation of Australia (now Orbital Corporation) injects a mixture of fuel and compressed air into the combustion chamber. When the air expands it atomizes the fuel. The Orbital system is used in motor scooters manufactured by Aprilia, Piaggio, Peugeot and Kymco, in outboard motors manufactured by Mercury and Tohatsu, and in personal watercraft manufactured by Bombardier Recreational Products (BRP).
In the early 1990s, Ficht GmbH of Kirchseeon, Germany developed a high-pressure direct injector for use with two stroke engines. Outboard Marine Corporation (OMC) licensed the technology in 1995 and introduced it on a production outboard engine in 1996. OMC purchased a controlling interest in Ficht in 1998. Beset by extensive warranty claims for its Ficht outboards and prior and concurrent management-financial problems, OMC declared bankruptcy in December 2000 and the engine manufacturing portion and brands (Evinrude Outboard Motors and Johnson Outboards), including the Ficht technology, were purchased by BRP in 2001.
Evinrude introduced the E-Tec system, an improvement to the Ficht fuel injection, in 2003, based on U.S. patent 6,398,511. In 2004, Evinrude received the EPA Clean Air Excellence Award for their outboards utilizing the E-Tec system. The E-Tec system has recently also been adapted for use in performance two-stroke snowmobiles.
Yamaha also has a high-pressure direct injection (HPDI) system for two-stroke outboards. It differs from the Ficht/E-Tec and Orbital direct injection systems because it uses a separate, belt driven, high-pressure, mechanical fuel pump to generate the pressure necessary for injection in a closed chamber. This is similar to most current 4-stroke automotive designs.
EnviroFit, a non-profit corporation sponsored by Colorado State University, has developed direct injection retrofit kits for two-stroke motorcycles in a project to reduce air pollution in Southeast Asia, using technology developed by Orbital Corporation of Australia. The World Health Organization says air pollution in Southeast Asia and the Pacific causes 537,000 premature deaths each year. The 100-million two-stroke taxis and motorcycles in that part of the world are a major cause.
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