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interesting quote on the 2 stroke from an economy site


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http://www.economist.com/node/21008760

"In truth, this was not the only reason for the two-stroke’s disappearance. Most of the leading motorcycle makers of the day stopped building two-strokes not because of concerns about pollution, but because they wanted to focus on their pricier and more profitable four-stroke models. A rule change finagled by the manufacturers, which forced 250cc two-strokes to compete on the track against 450cc four-strokes, did the trick. The two-stroke’s demise—at least on the road and the track, if not in the dirt, the snow and the forest—followed swiftly. "

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It would be interesting to see sales margins both from the factory and from the dealer on the 125/250/250f/450f. Perhaps back a few years like 2005 when all the manufacturers offered a 2T lineup.

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The 2T is holding the line right now with strong demand for the Husky, KTM, Gas Gas and TM brands. The 300 EXC is KTM's biggest seller. Husaberg has come to the fore for 2011 with 2 models which will probably be a front runner for a 2012 efi version. EFI will change the face of 2 stroke dirt bikes. The technology is there -already used on snowmobiles and piaggio scooters. EFI basically mists the the fuel to 25,000 air/fuel droplets per cycle. Carbies produce about 500. This massive difference will reputedly do the following;

increase fuel economy by up to 100%

provide a torque curve closer to a 4 banger-not having to rely as much on the pipe

and polution back to 4 stroke levels.

This technology is provide out of West Australia by the Sarich Corporation (Piggio et al use it). KTM tried to get it ready for 2011 but missed due to funding allocations being thrown at their struggling duke range. Look to it for 2012 and hang on they will be back.

I love both bike engine formats for their separate and unique characteristics. An efi 2 banger could be just the answer to many of the 2 strokes weaker aspects and with their simplicity, light weight and low maintenance could make a come back bigger than lazzarus. heres hoping

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That's what I figured. Guess this could finally be the end of premix! 😏
And that's actually a good thing, not just from a pollution standpoint, but for engine longevity as well.

With the oil being injected directly where it needs to go, you no longer have to rely on simply having large quantities of oil to ensure that all the parts that need oil get oil.

With no fuel moving through the crankcase, there is no danger of the oil on the parts becoming diluted or being washed off.

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