Chop

Some of what you say is true some not so true. People that buy 1000cc bikes are pretty good riders and they wreck a lot less than the 600cc guys. A top notch 1000cc bike brings $12,000.00+ new and guys try to protect their investments. As far as performance goes they are tough little buggers, when you can get better than 3 HP per cubic inch from your power plant you are approaching F-1 car potential. Durable?? you can expect 3 or 4 years hard racing out of one of them, BUT they are getting a little harder to find and price has increased about 30% in the last few years. Supply and demand. With the 4 valve auto engines it is again a buyers Market.

The trick for D2 it to prevent people trying to get 2 horsepower per cubic inch out of these little motors.

Honest Dad himself