Can anyone help me to narrow down a new vibration problem? Bike is a 2006 950Adv. 2-into-1 FMF Q2. Uni Pre-Filter. First off, I screwed up and made way too many changes at same time. There is a reason why it happened this way. I won't get into it other than to say, mistake. Bike feels noticeably torquier at the low end all the way from idle to 4000rpm. Perhaps this is the 2:1? There is a new vibration that starts coming on at 4700 rpm and by 6000rpm it's VERY noticable in the bars/footpegs. For long distance you really need to not go above 4000 rpm else it gets very fatiguing. There is another thread which seems similar though I have the issue if I'm cruising not just accelerating. On way back from my ride I stopped at Beerlslayers house and we swapped bikes. I rode his 2006 950Adv w/ 2 FMFs. His bike feels less torquey but the vibes on his are less pronounced and constant from idle all the way to 7000rpm which is has high as I tried. Beerslayers comment was that he didn't think he could ride mine long distance. These are all the things I've done since the last tiime I rode it: Valve check, no adjustment, in spec. New spark plugs. Iridium. I slightly changed gap to be exact spec. Removed carbs, checked jetting. Front: 1 1/2T out 155M 42P n#3 Rear: 1 1/2T out 160M 42P n#3 -- basically stock except for the clip position. I had some issues with carb boots (see below). New waterpump bearings, shaft and seal Retorqued clutch pressure bolts per ktm bulletin Synchronzied carbs Installed DrBean fuel pump points replacement Wired up relay box behind headlight, ran wiring up right side and thru steering head with rest of wiring. Tight fit. Installed CJRacer 2:1 and Advtank I'm confident I assembled the carbs correctly (reinstalled jets/needes after verifying settings). I did have some issues with some rubber flaking off on the inside of one of the carb boots but it didn't look like it impacted sealing. I'd have thought if I had an airleak it would affect rpms below 4000 but maybe not? I just rechecked the carb sync and it seems ok. Video here and another copy here I was wondering if somehow the bike is stuck on the low-octane setting? The plug is connected at the rear of the airbox and I tested it is grounded with DMM at that point but perhaps there is a break between there and the ECU. I imagine I would need to check for ground on the actual pin on the ECU connector which is hard to get to. Any suggestions?