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Okay, good luck. Let us know how they turn out.

He might need to make monthly payments Giving away "TSS" for FREE!!!

I would split your cases and see if there is any other damage that was done first so you can gauge your budget. If your crank is toast and your going to go with a 4 mil you might as well get a 421 driveline setup or cub, serval, etc whatever your riding style demands are. But either way, doesn't matter with what option you choose, your gunna have to learn to tune the bike with any setup you get. Also, you CAN run anything you want with the setup (fmfs, stock carbs), most people don't and it just wont be optimal and there will be more power to be had for sure. btw if u want the 421 setup with better pipes and carbs your budget is gunna have to be more than 1500 crank- 450 top end- 800 to 900 pipes- 550 to 675 carbs- 350 filters- 80 adds up quick

Race gas doesn't properly combust without enough compression or when there is a lack of timing. If the motor is set up to run premium, that's the fuel it should have in it. It is an absolute myth that race gas adds performance in and of it self. All that crap you hear people say about their motor running like a raped ape on the race gas from Sunoco is just nonsense. Think of it this way. Octane is a number designated to a fuel to show its resistance to combust. 91 has a lower resistance to combust then 110. So if you take a motor that is meant to properly burn 91-93 premium, it doesn't squeeze or compress the mixture enough to combust 110 octane race fuel properly. Leaving you with a blubbery half ass burn. So can race fuel make a motor run better? Only if it's a motor set up to do so.