Ys still makes some of the best engilnes arround, but now just 4 strokes. Think you can still get repair parts from "performance specialties", the Nelson engine people. I have a 60 and 45 rear exhaust nib in my engine cabinet and would not part with either. Set up correctly, yes they will beat about anything out there but a Jett Engineering engine, my all time favoriate engine is the bse Jett 35. All sports jett enginess will idle with a speed prop, transition like no other, and give you a killer top end. Initial investsment is high, engilne life of years make them the cheepest engines I have ever had. ENJOY