I just finished rebuilding a 2011 BF650 SRA engine, camshafts installation was done by the book (rear cylinder first then front cylinder, all the dots and marks allign perfectly), valve clearance done by the book (front cylinder then rear cylinder),
I'm puzzled a little bit, when I turn the engine by hand (from the clutch) there seems to be a great deal of suction from the exhaust side for both cylinders, is this normal?!!!
does the 2011 model has a different timing sequence?!!!
I have completly rebuilt 4 BF before (from05 to 08) and never had this happen, by the way I'm using a 2005 service manual.
Let me know your thoughts, thanks.