It's too bad most of you guys are idiots. Anyway a broken valve spring and valve stem is not a huge, big, expensive deal, especially on a Harley. Take the heads off, because both cylinders should match and replace the valves and springs etc. It sounds like you didn't lunch the really expensive stuff, like the bottom end, so likely you have a relatively easy to do repair. It will still cost a few bucks, but there really isn't any reason to replace the rest of the motor. I'm assuming that if you put that much money in to the motor you beefed up the lower end to handle the increased hordepower. So in hindsight that is a good thing, likely the damage was contained to only one cylinder and everything else is good. Find a reliable shop and you will probably be back on the road in days, not months. You could not have damaged the camshaft etc., so really because of the old engine design the damage is contained to one cylinder and shouldn't be that expensive to repair. But you really should know this stuff if you are spending big bags of money on a bike.
