Have a read of the tuning section, and then come back here with a damn good excuse why you shouldn't open up the airbox and let that engine breathe as it should!

Running without a filter is a bad idea on the street, as everything sucked in to the engine grinds its way round the crank of course.

I doubt you'll find anyone who agree with leaving the engine stifled when de-restricting it is free.

Once you've done that, then you'll need to re-jet accordingly.
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