Really stupid question

[sortastock]

For 07-08 race season, are the yamaha four strokes 600's?

 

[Irace]

Doubt it-
The 1050cc Nytro is class legal for 600 class NOW
The Phaser (500cc) is legal for Junior 14/15, 16/17 and Sport 440, Semi-pro 440
Would make much sense to have a 600 unless it could be raced with
440/600's