RE: 2 or 4 stroke engine in a trainer ?
Continuing in this vein --- Ed have you tried a TT .46 Pro with a 13-6 (I haven't)? It might be an interesting experiment. I don't have a 13-6 with an un-reamed shaft hole, so I can't try it. If you have a virginal (spare?) 13-6, why not put it on one of your TT's & see what it will turn? I'm guessing about 10,000 -- what does you Saito turn it at?