did you say it is on the left side? or Right side? Put a 2x4 under the motor so you don't wreck the fins and be gentle actually in how you position it before lifting the frame off, is more aligning things than brute force. the motor comes out the right side of the frame. at least the F we just took apart came out that way.

H.C.C.M.F. Local 6978
http://hondacb750parts.net