Okay, pics of the little diesel that's not going on the minibike.
I made a liar out of myself and over estimated the hp rating because I transposed the kw rating. It's 4.8, not 8.4.
Anyway, it works out to about 6.5hp@3600rpm. 315cc displacement, 1" output shaft. Kohler bought Lombardini around 2008 and the engine is still in production as the KD315. This engine is a 2004 with MAYBE three hours on it. It just needs air and fuel filters then it's ready to rattle the neighborhood. These little boogers are loud, with the accompanying diesel rattle and stink.