I noticed on my 630 that the first twist of the throttle from idle results in a little delay. Once I'm above idle this doesn't occur. Is there something that can be adjusted with a tuner to fix this? I haven't measured cable slack, but that doesn't feel like it. Could also be where the 'zero' is set for the throttle position sensor?
Do you have the PU kit ?, if not, get it as a starting point. If yes, then was your ECU recalibrated by the dealer when they installed the PU kit as that is what needs to be done. Have not heard or experienced this before. Faulty TPS ?, maybe A Tuner may be able to fix it, but there may be other issues.
What does it mean to be recalibrated? Haven't others just installed the PU kit themselves? The dealer had installed the PU and removed all the emissions stuff prior to my picking up the bike, but recalibrating is something I haven't heard of.
The dealers have / should have a software product called iBeat that allows them to program / calibrate the software maps (tables of parameters split by engine speed and throttle position ) in the ECU which is madeby Mikuni on the 630. The parameters include values for fueling and possibly ignition timing. Recalibratiing the ECU means fine tuning the software maps to more suit your bike and environmental conditions such as altitude, ambient temperatures etc. Recalibrating the maps can also be used to fix bike specific problems as in your case. Maybe, and I am guessing here, your bike needs needs more fuel on the idle circuit etc Any hardware change, including the PU kit, on the bike such as a new exhaust or bigger holes in the air filer box to allow more air flow; should always be accompanied by a recalibration of the ECU if you want to get some or maximum benefit of the hardware change.
All that was done was a PU kit and that makes the bike stay in open loop mode, the one that was loaded into the bike in the first place. Don't see why another tuning session would be needed to run a stock bike on the stock open loop map. I'm also wondering if my idle isn't too low - I see people posting idle speeds of 1700-1800 rpm. Mine is at 1200. Maybe it's just too low?
I would say 1200 is way too low and 1700-1800 is about right. Hooking up to iBeat and re-setting the TPS might need to be done along with turning up the idle, which is a by-pass. I put a 300 kit on my 250 and finally got it adjusted via iBeat. It idles smoothly at 1700 or so and will not creep on the kickstand like it did before. Whether or not adjusting the TB1 or CO1 will fix the hesitation is a guess but the other two are pretty sure to make it better.
1200 is too low. Manuals state that proper idle speed is 1650. I'd start there and see if that fixes your problem. No tuning is required post-power-up-kit. I installed my power-up and adjusted the idle myself, and have my own iBeat on hand. A quick check of it showed that no TPS adjustment was necessary afterward. Now, if you cut holes in the airbox and/or change the exhaust then yes, you need to adjust the fueling.
