both mine responded well to it..
why would it NOT work? when I hear why it would not work Ill start listening..
that 3000 to 6000 rpm got stronger and smoother. Same thing on the car forums, they guys that wouldn't try it said it couldn't work.. the guys that did try it said they got a smoother engine and better gas mileage .. but I guess not everyone gets the same results. 1:600 is what they were using but they are liquid cooled. .. 1:600 didn't seem to do anything to my 1203.. I took it up to 1:300 and that's when I felt the change. No WAY did the bike get slower though..feels smoother and stronger. I think its just a better version of putting a little MMO in your fuel.
right now Im using Redline "Racing Oil" 2T.. and the consistency is about the same as MMO but its a synthetic oil..