http://www.bikesportnews.com/news/news-detail/brand-new-750cc-180bhp-sportsbike-from-spirit Very nice bike running triumph 675 bored out. They are running in Supersport 600 BSB, with a standard. 675 this year, but not scoring points because there too light. Alister Seeley riding, just got 2nd at brands today.
Sounds like it might be being used to help develop the 765 motor for Moto2 as well http://www.tomcc.org/Home/News/c7e18f95248d4dceb7ad0a67a4d3fe16 It looked like they had removed the engine case logos at the Brands round. It's certainly rapid though
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That's the idea, with no new 600's coming on the market it's intended to bridge the gap between the new 300 class and the 1000's.
That seems to be the intention of Spirit, a Moto2 class to replace 600 supersports when it dies in the next few years, or ends up as a one make (Yamaha) series.
