They ported the heads, bored the Harley bigger bore cyls and supplied pistons made to their specifications, I'm also using their 0033 cams. I built the engine, there is a thread I started on the build http://www.triketalk.com/forum/harley-trikes-6/06-twin-cam-120-build-lots-pictures-10608/. The whole package turned out exactly as I had planned. I was looking for a Jekyll & Hyde personality, a combination that had good parking lot manners and nasty when you twist the throttle. I've been caught in road construction zones in 90 degree temps and my oil temp never exceeded 230 degrees, it runs pretty cool considering its size.
Last weekend my dad took it for a ride, while I followed on his trike. Each time he rolled in the throttle I could see the front end start to rise and the bike get much smaller as it accelerated away. You can get to 100 mph before you blink an eye, its a hoot to ride.
