Airbox trumpets
 

I've just taken the airbox trumpets off my otherwise standard 750ss and apart from the added growl it's also smoothed out the pickup of the engine coming onto the throttle. I can now open the throttle harder without it simply bogging down from a flood of petrol.

I've been checking the plugs since doing this and the engine seems to still be burning on a near perfect mixture going by the colour of the electrodes.

You probably all have modded airboxes and K&N filters anyway, and thus this is redundant as advice, but I thought I'd share my experience anyway. :)

Yep. Modded airbox, K&N filter and Power Commdander here. Pulls from nowhere like a train. :D