I have an Exceleron with a YS.91 in it. The problem is that the YS was in a crash, and I cannot get it to run right now. It does not idle well and sags real bad at mid range, and does not seem to be putting out a lot of power. I am considering sending it to YS Performance, but am not sure it is worth it. I'd like to put a .110 in it, but just can't seem to find one.

Is it worthwhile to get this thing repaired, or just find a new engine?