Two-strokes set to continue at MX Nationals in 2015 (not VMX)

[80-85 husky]

I see injection as a drop dead issue. its seen to be reliable but if it stops in the bush or a "sensor" fails your knackered. same as water cooling its fab, but spear a radiator and your done.

[Racer X]

In the USA though you might still be able to buy a two stroke in California, you are limited to when and where you can ride them, and it looks like you have to 'register' them.

So if the manufacturers still see California as one of their biggest market sales areas, they may be reluctant to go back to developing anything 2t.

And don't forget that Australia's sales market usually doesn't factor much into Japanese overall sales considerations.

Web page for California regulations:
http://www.arb.ca.gov/msprog/offroad/ofhwymc.htm

Ever been to L.A. the polution is discusting? I can see where the 4t push comes from.

[huskibul]

   You'd have to think a 99.9+ % of a city's  pollution would be from 4 strokes -  millions of Car's/trucks & bus's  dont think a few two bangers will turn that around

[Nathan S]

California did have a rule which specifically prohibited any sort of oil in the combustion chamber. It killed the Mazda rotary there for a while, even though they consume less oil than, say, a Gen3 Chev... The issue was the the Mazda (like an auto lube 2T) deliberately injected some oil.

That said, you could buy an RX-8 so maybe they eventually realised that proscriptive rules are dumb?

[Lozza]

Some reports out of Holland have a new 125cc engine with 70hp reving to 30,000 rpm and 80% less emissions. A few people have seen it running and apparently the technology is very simple. Look up Mcd Twist Ryger Engines on FB.