I have been trying to diagnose a "warm engine" hesitation at low throttle openings, most noticeable when trying to start out from a stop. When the bike is cold, it pulls away strongly with little need for RPM much above idle (I try to use 1200 or so).
However, when the engine is warm and in warmer weather in particular, the engine will stall if any load is applied to it below bout 2,000 RPM. It just has no power at all and is even sluggish when simply revved in neutral from idle. The problem seemed to get a lot worse with the advent of E10 fuel, but I am not 100% convince that this is the problem as occasionally it will respond reasonably well even when hot. This behavior occurs about 70% of the time when starting out warm.
I thought it was the normal "hot weather" fuel mapping issue with the LT, so I bought an Accelerator module, but that seemed to have a very minor affect if any at all on this problem. I am wondering if there is a sensor that is flaky, but it that is the case I have not been able to catch it on the GS-911. I just did another routine code scan and no codes have ever been set and all sensors seem to be reading correctly, including the O2 sensor, at least as far as I know.
Here is a scan I just took at idle with the engine fully warmed. The plot looks fine to me, but I am wondering if anyone other GS-911 owners can take a look and let me know if this looks similar to what you see on your LT.
Scan appears a bit sluggish as the time spacing is long, but the High/Lows are good. However the time spacing is also related to parameters set on screen to gather realtime data. See attached screen where the GREEN arrow is pointing.
Unless I am on site with my GS911 (cannot obviously), I will need more data. A few questions:
1) If parked on center-stand, at proper engine temp (to cause the issue) would you be able to open throttle from idle in neutral and make it so to reproduce the problem ?
2) If you cannot do above in neutral, then it means the hesitation is only when leaving under load - correct ?
3) Using the GS911 datalog- to-file option, could you do one file at temperature to cause problem (using “normal” data sampling) The best (if you can) would be to use a very small laptop inside top or side-case and do the realtime data log under load when riding the bike in problem conditions (for 5 or 10 minutes). Otherwise do it on centre-stand in neutral.
In item 3 above, use all data items (defaults) for logging purpose. Accept default file name or change it if you want - extension is CSV for "comma-separated-values" - not a true EXCEL file but can be read and converted in Excel.