Guys,
I apologize if I overlooked it, but searched and could not find a comprehensive procedure for synchronizing the throttle bodies on a 2008 S2R1000. I would appreciate it if anyone can point me in the direction of that procedure or provide me the step by step. I will use a TwinMax.
Thanks,
Jeff
This is a procedure for my 999S I posted on another forum but modified for my 07 S2R1K
GENERAL DISCLAIMER: THESE ARE THE PROCEDURES I USED SUCCESSFULLY ON MY BIKE. IF YOU PLAY DUCATI TECHNICIAN AND SCREW YOUR BIKE UP, YOU ARE RESPONSIBLE NOT ME. I CANNOT BE RESPONSIBLE FOR ANY ERRORS IN MY DESCRIPTIONS BELOW.
Resetting the TB balance WILL cause changes in the mixture metering so it is appropriate to reset CO% and trim level.
1) Install carb sync tool to throttle body taps.
2) Zero out CO gas analyzer and let it warm up.
3) Connect VDST and sync to bike. Reset TPS.
4) Close (clockwise) the TB air bleed screws fully on both TBs
5) Start bike holding part throttle at 1200rpm (idle speed). The bike will not idle by itself since the air bleed screws are closed from step 4. Using screwdriver adjust TB balance screw to balance reading on carb sync tool. The balance screw is located between the TBs from the front. Yes this IS a test of dexterity and multi-tasking!
6) Hold throttle at 4000-5000 rpm and re-adjust TB balance screw. Check idle rpm again and settle on a compromised balance. I shut off the bike and let it cool down at this point. You do not want the bike too hot because the ECU will richen up the mixture throwing off your CO% adjustments. Reset TPS.
7) Back off the air bleed screws 1-1.5 turns out.
8 ) Restart bike and place the CO gas analyzer probe in one of the exhaust opening then the next(eg. vertical or horiz cylinder). Read CO% between cylinders and balance them using the airbleed screws. While doing this make sure you do not totally screw up the carb balance on the sync tool. The goal is to balance the CO% between cylinders at idle. I'm not so much concerned about the actual CO% levels as long as they are close to 3-6%. Once you are happy with this the bike should idle smoothly on its own. Let the bike cool down. Drain condensation (if any) from gas analyzer and let it stabilize back to ambient air.
9) Restart bike and verify CO% readings are balanced between cylinders. Go to VDST and adjust the fuel trim level to achieve a CO% of 4%-5%.
10) Reassemble bike and experience how smooth a Twin can be (and never experience traffic light or throttle chop stalls again!).
Excellent. Thank you.
-Jeff
I need clarification on the TPS reset step for the S2R1000 / 5AM ECU. When resetting the TPS using the VDST on the S2R1000 / 5 AM, is it simply a matter of using the computer to reset the TPS with no wrench turning or do we still need to follow the old procedure of putting slack in the throttle body linkage to ensure the left throttle body is seated?
The instructions I have read are unclear, but seem to indicate it is all done with the software on these bikes. That does not seem right to me, though. My TPS read 2.8-degrees and reset to 3.4-degrees without me physically changing anything on the bike.
Thanks,
Jeff
The resetting of the TPS does not reset the read value of the TPS. Rather it calibrates the fuel maps to the reading of the TPS when the throttle is closed. What this means it that if your TPS physically reads 3.4 when the throttle body is closed and you "calibrate" it, the ECU will assume a closed throttle when it reads 3.4 degrees.
That makes sense. My real question is whether it is required to back off the right-side idle screw to put slack in the linkage to ensure the left (TPS) side is fully closed on the S2R1000 like the earlier models.
-Jeff
As long as the throttle cable has just enough slack to ensure that the TB is closed against its stop screw, it doesn't matter. The physical opening of the TB when in the closed position is compensated for by the idle air bypass screw adjustment. It is possible to screw around for hours getting the TPS reading as low as possible but in the end it will make no difference once you recalibrate the maps to the TPS closed value.