Does this bikes qualifies as a C Racer?

Yes, definitely.

JohnnyB

Dingo....what the hell kind of Yamaha engine is that?
Appears to be a two cylinder two stroke from the exhaust...but looks like a single cylinder.
JohnnyB

Never would have guessed an RD400...that cylinder head makes it look like a big single. And guess what...I owned an RD400 Daytona for a while and I still didn't recognize that bike.
I'm guessing it goes pretty freakin good. Looks light too.
Closest most of us would come to a modern two stroke sport bike on the street.

Let's pray they get 2 stroke direct injection worked out on engines larger than 50cc...we could see the 2 smokes back on the street again.
JohnnyB