I’ve been looking through, and I couldn’t really find a answer to this question yet.
I was wondering if there is any difference in performance between different year model Rotax Sr engines. I heard that the 07 cylinder was dyno’d and has almost 1 hp more than other years. But I read on another forum that the 09 barrel is a few tenths quicker than an 07. I’ve also heard from people that the newer models are quicker.
So basically I’m not sure what the deal is on this one. Is there a difference in top end or bottom end power between different year Rotax’s(old vs new, 07 vs. 09, etc.)?