BT,
You are having the same problem my wife has, not enough seat time, but you have one other, trying to do too much too soon.
She's been riding a cruiser bike for 2-1/2 yaers and has a grand total of 1640 miles on it. She wanted a sport bike, so I got her a YZF600 that probably has about 300 miles in 6 months.
She still freaks out riding on inclines, and she slows way down on curves. It totally annoyed me this past Sunday when I got her out on the cruiser bike, whenshe asked me how to lock the bars when we parked. She rides so infrequently, she doesn't remember how things work on the bike.
She get's pissed at me when I tell her she needs to ride more and practice new and old skills. Not withstanding the fact that she is only a fair-weather rider, she claims she doesn't have time to ride more, but she has been making noise about getting another bike.
The impression I get from you from what you posted so far, is that you envision yourself whipping through the twisties effortlessly with your bike leaned way over with your elbows scrapping the ground while all decked out in leathers. Doing it while riding the baddest machine out there, the Busa, is even better.
Kicking in the afterburners on the Busa while in the twisties is very scary, and very dangerous, especially when trying to lean the Busa way over around tight turns. You need to really know the road you are on, knowing every turn from memory before you crankup the speed. From what I can recall, you mostly ride alone and probably never followed behind someone who knows the proper lines to ride on the roads.
I ride once a week with guys on 600 and 1000 cc bikes in the twisties who float through the turns like they are on a cloud, while I am using 100% concentration to follow them and am still falling behind. Why? Because these guys have ridden those roads for years, they ride them 4-5 times a week, and they do track days. Plus, the Busa can't necessarily corner as well as those lighter and smaller bikes.
There are thousand upon thousands of riders here in Cali, with hundreds of miles of twisties to ride. Just on the local bike board I post on, every week there are at least four newbies and guys who should know better who wad their new bikes into cars, trees, and rocks. The bike of choice? The Yamaha R6. Why? Because they want to go fast through the twisties without ever learning how to do it correctly and with minimal skills. Most of these bikes have less then 100 miles on them. These are the guys who didn't need anyone to show them how to ride, they will learn it as they go.
The local board puts on free twisty rides every week where they teach a skill first then take people on three hour rides to practice that particular skill, such as cornering, tight turns etc. There are 30 to 80 riders who participate, with the main problem is getting enough leaders and sweepers to break the groups up in small groups.
Very few people have a natural ability to ride fast and well. It takes practice, more practice, and proper instruction on how to do it right. The best way is a novice trackday class. Around here, tht costs about $200 for a one day, or $350 for a two day class. The second way is to ride with someone who can give you pointers and show you how to hit the turns. If you have to hit the brakes or change your lean angle in a turn, you aren't doing it right. the third way is to read books such as "A twist of the wrist II" or "Sport Riding Techniques", preferably with a video.
A skill like riding takes practice to get proficient. Once you get better and smoother, you get faster. Trying to be fast won't make you smooth. When I learned how to fly, it took me 40-50 practice attempted landings before I could consistently make good landings. If I don't go out on a sunday and practice a few landings, I get sloppy. It's the same with with everyone, no matter how many years you have been doing it.
Do a novice trackday, find a few riding buddies who know how to ride before making a final descision about the Busa or getting another bike.
Good Luck.