Discussion 2-stroke revival?

Wow, I didn't get the message about all these replies. Where to start...
There are no emissions regulation for motorcycles in Australia, just as long as they don't blow smoke for more than 10secs. As pointed out, there are injection systems like those from Orbital used in aprilia soocters and evinrude outboards that greatly reduce emissions - can't remember if they are wet bottom ends and inject only after closing the exhaust port, thus no unburnt fuel escaping out the exhaust. So Australia is 2-stroke friendly.
The electric bike/car has come along way and I've read good things, but if you want to go past the battery range you have to wait 5-8 hours. They need to use generic battery packs that can be swap-and-go style servos. Ilse of Man TT race has e-bike category, check them out.
2-strokes are like turbos: the sudden rush of power makes them seem more powerful then they really be, but makes awesome fun. 125 MX bike are great fun because you have to be all over it to get the best from them and the sound like you are going fast, even if you're not. :-D Breaking traction on the dirt is fun! Breaking traction on the bitumen is scary on a bike, I should know, I had an R1 with a powrband, didn't go well for me or the bike when I high-sided it. This might be their biggest obstacle.
Maintenance schedules is the other. Many high-revving 250 4-stroke road bikes never have the engine apart in a 100,000km - one guy with an Across reckoned he had done half a million ks on his without a rebuild. This is the other major factor.

But the gist seems to be that there are some enthuists who do like the 2-banger, but they tend to have grease under their fingernails and a few projects in the shed.

 

OK, time for honesty. I was really doing market research to see if it was something worth pursuing as a business, manufacting modern 2-stroke road bikes. The market seems like they are more secondhand buyers with a few possible new (I estimate about 1 out of 100 interested people to be buyer, and that might be spread over 10years). The issues are maintenance and reliability (modern vehicles have very high expectations and don't accept sudden failures, with racing dirtbikes being the exception) and performance of a 600/1000cc supersport being so high - I'd need to make it under 130 and over 130hp to get noticed. It's a big task, particularly at a retail price of under $15k. So, it would be either a H2 style of high-priced performance in ultra low numbers, or maybe nor at all.

 

2-strokes seize up when the big-end bearings collapse and jam, not uncommon on dirtbikes, 2 and 4 stroke. Life span of MX dirt bikes are much the same for 2&4-stroke, so long as they are serviced as per the manual, which is very frequent.
A 4-stroke road bike might live for 100,000km on just a couple of oil and filter changes. It'll need some designing to get a 2-stroke to that level.

Also, if a 2-stroke was to make 200hp, the power band would have to be smoothed out to avoid killing people - current 4-strokes already want to kill people just for sport, let alone the anger living with particial chaotic airflow rhythms. Oh well, maybe we'll just skip 2-stroke and go to the next compact power plant and advance it. NOT Wankel rotary! Though I know I could improve it.

 

Is it the 300? Apparently the new 300 is very well-mannered and tunable in power vavle more than the usual opening at a set rpm. But does that make it less 2-strokey?

 

@maelstrom the e-Tec system is used by Aprillia, but only on scooters. The Rotax engines you refer are currently marine and snow, they seem a bit heavy (and that's without transmission) and chances are these applications don't put as many hours on a motor as road vehicles. Check out the Rotax range on their website. I've heard some reports on Rotax engines, but need to find out more about durability of their 2-strokes.