Join Date: Mar 2008
Location: Hamilton, ON, Canada
OK if I chime in on this?
I just recently did a valve clearance adjustment on my bike - found the rear boot was loose and reinstalled and tightened it. I'm assuming it hasn't come loose again already. New iridium plugs, new air filter, TBS done. I've been out for a few decent rides since, sometimes riding it hard, sometimes cruising at fairly constant speeds for a while, and the idle was dead solid.
Until today. Rode my bike to work, thought the throttle was a little iffy at low speeds, but didn't notice until I got to my parking lot that the idle problem and low speed running issues had occurred again. Same thing on the way home. When I finally hit a traffic light I did the open-close throttle thing and cycled the ignition, and it started running fine again.
So, I think I can rule out any tuning issues or the usual suspects. I don't know what the next step is. I guess I can try replacing the TPS - it's not cheap, but not super expensive - although it's a bit of a pain to get at. See what happens.