I like the bings and prefer them for these bikes. They work well and are easy to maintain. The Mikunis, on the other hand, don't fit right up as easily, needing some custom work on the intakes sometimes, and the airbox tubes. My only bike with Mikunis is the LS with the 850 kit. I attempted to swap back to bings, but the heads have been extensively worked over with the intake ports now 36mm; the bings didn't want to fit on, so re-installed the Mikunis. I do like the way the bike runs with them, but I'm not a hotrodder, so don't really notice the bike running any better or worse than stock.
But, I must add, the reason racers use Mikunis is quicker response. That, and possibly better top end flow. But these beemers aren't race bikes, and when treated that way don't hold up all that well. And besides, they don't do that well in that sort of racing anyway. If anything, these bikes do well in endurance racing - not sprints.
