Don't get too concerned dude, you'll have plenty of time to get on the pace, but this season may have to be treated as a setup season. I'll certainly be treating it that way after leapfrogging my way down the standings!
You're also likely to end up with the best prepared bike in the pits, tailored to your needs by one of the most imaginative mechanics in the country. I'd give my eye teeth and various other body parts to start next season with a well setup Louigi bike. So don't worry, it's not a question of if, just when.
Nick; the carbs are the only option unless you have the full loom, ignition barrel, ecu, coils, etc, etc, etc..... the list is endless and expensive, and that engine didn't come with any of the above!
Cheers,
Ali