Mike, I also make the motor adapter you are referring to, for about any engine, as do others, I also mfg a u-joint carrier that uses full midget/ sprint size joints and driveshafts, as do others, that's just part of it, the part of the rule I am talking about is the part that says the drive line will be a direct connection between the end of the crank, and the lower change gear in the rear end , in other words, no reduction between the two. That is the protection for the Honda. But, there are other r and p, and chg gears available that aren't common knowledge that can get you low enough. Bob