A cash generating part for Suzuki is a whole gsxr, not a stva. Stva and many other things need for gsxr to be one of the best street legal bike "almost race bike". Your gsxr was been ugly abstructed I think.Haven’t had any adverse affects on my bottom end. I ride Gsxr 750 and school 1000’s on the bottom end. Stva is just a myth, a cash generating part for Suzuki. If it fails they won’t sell you the part alone, you would have to dish out over $1000 for a whole new throttle body assembly. Hope it’s worth the smooth city ride.