Join Date: Dec 2011
Location: Los Angeles, CA
Mentioned: 0 Post(s)
Digging this one up again. This weekend I checked the TB sync with a dual gauge vacuum sync tool. The right TB was running just a hair lower than the left, so I adjusted it so they were both dead nuts on. The vibration is just as bad as before. The idle seems to be fine now, but in all areas of the rev range, it's much buzzier than before. When I'm cruising flat and level, it's a real high frequency vibe that really tickles the nether regions. When I get on the gas, or try to keep a steady speed while going up a steep hill, I can feel each pulse of the cylinders firing. Feels like having an out of balance tire at a high speed, or holding onto a miniature jackhammer. I can feel the vibes in the bars, pegs, knees, and my mirrors are far more useless than before.
Performance and fuel efficiency seems to be the same as always, so this is just an annoyance as far as I know. I know it's a parallel twin, and they vibrate, but this bike used to be so much smoother before I monkeyed with the screws. Is there anything else I should look for or try? I pulled the plugs again this weekend, and made sure they were properly gapped and seated. The air filter is clean as can be. I'm going to try a different brand of gas next fill up, maybe go up a grade. Other than this, ideas?