The topic of 636cc Multi's continues to be a discussion point among micro racers. Over the past couple of years, I have heard many rumblings, assumptions and suppositions about other manufacturers following suit with Kawasaki and building there own 636cc superbike. If that were the case, micro organizations (NMMA) would have been pressed into serious consideration of the 636 as a multi engine.
However, it has been confirmed; Kawasaki has dropped the 636 from their 2007 offering in favor of a new 600cc "super Ninja". I feel the NMMA and many other micro sanctioning bodies have done the right thing by not allowing the 636cc engine.