Just got my Super Titan the other day to replace the regular Titan I've had for four years. They are great engines, my regular Titan took a lot of punishment from me, I'm a large Welshman and it has always pulled hard even when I stuck it on a large stretch cruiser frame. It only failed when the throttle got stuck and it stayed over redline till the connecting rod broke, but that was my fault, not the engine's. I have to say I can really feel the difference in the Super over the regular Titan already and I've only ran it about an hour. Not only does it pull harder, but the exhaust note is a mean growl compared to the chirpier regular Titan. I exchanged the carbs though, because the Super's carb had a plug where the idle jet adjustment is supposed to be. I also had already increased the size of the older carb's main jet to compensate for my high flow air filter and custom exhaust. The Dax team take care of their customers too! The only thing I had happen to the older Titan was the pull start broke, again my own fault for being too rough. Dax sent me a replacement lickity split and I was back on the road!