rich,
Back to the stock CVKs with 160 mains (gonna drop them down a bit I think), 42 pilots, thruxton needles, freak.
I had Steve Seeley do my heads for $100 cash, I'm sure he would do the same for anyone else. Took about 4 days to get them back. I have seen shops advertise the same work for upwards of $500 as well.
If you want more torque, yes the cheapest way is drop a 15 or a 16 tooth sprocket in the front. Or, if you want real measurable torque, throw the wiseco kit in.
The mikunis are excellent carbs, but I could never get mine to run right. I have since talked with a few others with them and they told me that they ended up going way down to 130/140 mains in them to keep them from flooding the motor with too much gas. And disabling the accellerator pumps. Seems this still defeats the purpose. I wish they had around a 38mm mikuni carb that would fit, I bet that would be the ticket.
But I can honestly say that I got more from the big bore than from any carbs setup. Maybe when I stop sending all my money to Brent and Bill Gately, I will try and fab up a pair of the FCR39 or 41mm carbs. They look like they may be some fun too.