One of the first engines I owned was a K&B 65 Sportster [:'(]
Since then I care not to discuss K&B, my 2 cents. Gobs of power no idle, what's more important?
Another one for me is the FOX line up, too many good engines to deal with setting one of these up and OS 4 strokes LOL , love my Saitos
I just bought 2 OS 46 LA's to go on a twin project, I will be breaking them in on my wifes LT-40. So far no problems, very reliable engine. I also just bought 2 MVVS 49's and a counter rotating crank for another twin project. We'll see, many good things being said!