bought my 06 RK early this spring been riding it all summer long with no issues,when i bought it she was bone stock.no pipes no air cleaner.nothing,i originally was going to leave it bone stock.(its nice being able to hear what my wife is saying to me when at a stop sign) but i decided to give it alittle more sound so i bought a set of BuB M-22 slip-ons and i ordered a dobeck TFI at the same time....pipes came to my front door.ups sent my tfi to texas for some reason (that's taken care of the guys at dobeck did a great job fixing the shipping problem) anyway i thought what the heck i'll go ahead and install the pipes and have that job out of the way...so i did.....now i figured with no TFI the RK would not run well at all i expected that.....not the case my bike runs ALLOT BETTER ....the thing idles smoother....more power....less vibration.....the works....now i'm lost i never thought in a million years that leaning a motor out that was a touch lean from the factory would make it run better??????(i'm going to install the TFI tomorrow)..oh yea i then thought....did the previous owner install a fuel controller and not tell me? nope pulled the side cover off and its all stock.... whats up with this bike?:unsure