B_M_F
Husqvarna
A Class
Your the MAN MAT! this adjustment fixed my exact issue with the performance! When i had the bike stock it surged like crazy under WOT got the power up kit that surge went away but a new one developed at very low rpm choppy etc. But now it runs soo smooth and throttle feed back is easy to predict also my clutch use hase gone way DOWN!Couple of things from my experience with a 09 TE510
1) optimum TPS setpoint provides full throttle of 100.2% - not 102%. This should put the idle position 1011 to 1016mV on my TPS.
2) optimum idle air bleed screw position is 2 3/4 turns out plus minus 1/2 turn. This results in a hot idle 1950-2100rpm. Using this screw to set idle rpm rather than off-idle throttle response did not work. (powered - up)
Right click on my user name and read my posts - but the SMR ECU may not use the same setup reference points as the TE version. This is an important point because i completed a tune on my bike using the Husky race ECU/exhaust insert and the TPS setpoints/screw position etc did not work - and the different ECU completely changed the personality of the bike. (aggressive initial timing curve and accelerator pump emulation is my opinion)
If you really want to optimize the non-powered up/02 sensor in tune - use the long-term adaptation tables in ibeat. For myself the stock ECU's o2 sensor lazy timing curve made the compromises too great vs powered up.
With the stock TE exhaust system, the 02 sensor required the mid-pipe baffle to operate consistantly - especially on overrun and small throttle openings. Since i found clay stains in the midpipe after running a full open exhaust - I would say there is enough external air reflux into the TE exhaust system to throw the system for a loop without the baffle.
One the keys (for me) when I first started using ibeat to mark 20% / 40% / 70% throttle on the twist grip assembly with a white paint pen. This gave me the refererence points on the center vales of co1/2/3. To put a little more fuel at 30% throttle - move co1 and co2 together at 1/2 value your would a single adjustment.
The wideband sensor is nice - but you already know the engine wants what it wants and that varies with the load/fuel distillation curve/ignition curve/intake temp/ and rpm. I tend towards lean low throttle settings and rich large throttle settings and let the accelerator pump emulation cover the hole in the transition. Fuel injection keeps the droplet size pretty consistent regardless of the intake tract air velocity - so it's easier to achieve this than with a carb.
Have lots of fun tweaking and keep good notes. The real test is plugging back in the previous valves after the latest "breakthrough" and realizing your nuts!
MAT