You mean they don't give away those titanium valves, skirtless pistons and all the bearings for all those moving parts? lol

4 strokes gained allot in a short amount of time, with copious amounts of money and R&D to get them there. Yea, a 50hp 11,000 RPM, 500cc engine is possible, but the price of the bikes did almost double allong with it. You basically have a single cylinder Indy Car engine when you are all said and done, and it's as durable as a $3 watch after you dropped it a couple of times.

Imagine if they had put the same efforts of R&D into 2 stroke technology? Hell, the 95 CR500 didn't even have a Power Valve on it! Litterally still mid 80s engine technology.

The only major player in the last 10 years to pursue any 2 stroke technology is Bombardier and Rotax. FICHT and Direct Injection has brought 2 stroke engines as the cleanest in the Marine (JetSki AND Outboards) allong with Snowmobiling. They actually use less oil than a 4 stroke counterpart.

Dumb thing about dirt bikes and atv's is the fact that in some states and national parks, they just flat out banned 2-strokes rather than give the industries a chance to clean themselves up. It's as intelligent a move as when the gov mandated cat. converters in the 70s on cars.