I'm sure this has been beaten to death already but...... What is the favorite engine for a 60" and 66" super z? Running the honda on a older 60" and its not bad other than the orig. air intake tube (plastic) was collapsed and the intake tub to the air cleaner was off. Had a piece of correct OD exhaust pipe put in it. That and valve adj. maint. Has gobs of low end torque which is nice. Also running a EFI with fuel pick up problems when run low in fuel and no low end torque, but no valve adj. ness.. seat of the pants feels about the same horses and fuel economy doesn't seem huge. have had older kaw. on walk behinds. I'm sure they're all fine. just wanted some people's opinions with big hours and first hand use. poss. replacing both in near future.