Yamaha’s 2009 YZ250 and YZ125 bike intro was not really to show off the bikes’ minimal changes, but to remind us how fun these bikes are. They gassed up their ’09 two-strokes and sent us out on a ‘Field of Dreams’-like private track to twist throttles and stretch smiles. This has to go down in history as the most successful bike intro ever based on a manufacturer reaching its goals. These pingers are loads of fun, and if you’ve been on a straight-gas diet for too long, you probably forgot the incredible response of the YZ250 (you don’t need a fuel injection system to spike your adrenalin) or the magical handling of the YZ125.

What if you could get a motor with nearly all of the characteristics of a 4-stroke and the lightweight and power of a 2-stroke rolled into one? Eyvind Boyesen may just be onto something with his revolutionary design.

While this article is from 2003, it does go to show that the manufacturers can do anything with technology when they put their minds to it. This unlikely advance comes from the company that many say was the leader in pushing for four strokes over the two strokes.

The following article is an amazing story of what is possible when technology is used to solve problems.

Vienna, Austria – KTM, the Austrian motorcycle manufacturer, presents the prototype of a race-ready Sport Enduro with electromotor, the result of a cooperative research project with arsenal research.

Lotus Engineering, in collaboration with Jaguar, is starting up a project they’re calling “Omnivore,” a task which, if successful, could see traditional internal combustion engines go the way of the dodo. Lotus is planning to meld the two-cycle engine with new technologies — direct injection and a variable compression ratio — to create an engine able to run on almost any fuel. If you’ve ever wondered what the future of the internal combustion looked like, you’re getting a peek now.

To read the rest of the article please click on the link below.

VP Racing Fuels INC., The world leader in race fuel technology, and Racepro USA have signed a license agreement for use of the VP Racing Logo with the new Racepro “Cool Fuel” Ice jacket.

First, let’s get one myth out of the way up front. It is common for modern critics of the 450cc four-stroke to claim that the AMA 500cc National Championship was terminated because bikes like the CR500 and KX500 were too powerful. Not true. Not even close to true. The reality is that the AMA dropped the 500 National Championships after the 1993 season under political pressure from Suzuki and Yamaha.

Whoever said the two stroke was dead, was dead wrong. Maico a brand from the past has rebuilt itself by using two stroke engines and top quality components. The new line up is impressive, check them out!

Maico 250 Cross

So much media attention has gone towards attacks on the two stroke engine, some claiming that it can not pass strict emission regulations. Well it is just not true, as proven here by Tanaka Power Equipment.

Video: http://www.racerxonline.com/video/billy-mackenzie-british-champ.aspx

Hear what MX-GPwinner Billy MacKenzie says on competing on a1998(!!!!) CR500 in the BritshMX Championship sunday 21 sept.2008.