s2r1000 idle

[slash]

I have an 06 s2r1000 with about 24k miles on it.  I posted this question last year http://ducatimonsterforum.org/index.php?topic=30130.0 about the stepper motor idle control.  Mine cycles up and down between 800 and 1600 rpm when the bike is warm and stalls.  A real pain in traffic where I have to brake and keep giving it throttle to keep it from stalling (i know the servo becomes inactive at about 30o of throttle).  Is there anyway to service/clean the stepper (squirt carb cleaner through it or something).  What about seafoam, or do you think I'm barking up the wrong tree.

Related question: can you cut the steppers motors effect on idle to a minimum with the Matheius, and maybe use a throttle cruise controller to fast idle until the bike warms up (if you don't want to spend $700 to replace a stepper motor).

[Duck-Stew]

Best option is to get the ecu reflashed to the DP specs (if you're running any sort of exhaust more than stock) and that will eliminate your stepper motors function and your problem.

[Bill in OKC]

I have the DP ecu and removed the stepper motor and capped the unused air fittings.  I also installed a fast idle button off a ?996? I think, it replaces a part of the throttle housing.  Works pretty good.

[booger]

+1 I'd just get rid of the stupid thing. A fast idle lever is a feature of the lower-end bikes; ironically it's preferable to the stepper in my view.

[pennyrobber]

If you remove the stepper and cap the lines, but keep the stock ECU, will you get an error message or engine code?

[Bill in OKC]

I don't know about the stock ecu.  I was worried about it with the DP ecu, but no error codes after a year and a half.  I would think the DP ecu also uses the stepper or how else would it adjust the idle on cold morning start-ups?  I don't know.  An easy way to tell with the stock ecu would be to just unplug the stepper's electrical connector and start the engine.  If you get an error code plug it back in.  That might also give you more information if the stepper motor is the problem or not.

[slash]

I'm an idiot...I forgot to say I have a DP ecu and a full termi system.

[TJR178]

Pardon my ignorance, but what/where is the stepper motor?  I seem to have this issue as well.

[Bill in OKC]

It is an air valve that bypasses the throttle plates so the computer can control the engine speed.  The valve takes filtered air from the airbox and passes it to the TBs under the butterflies.  The stepper motor controls how large the opening is in the valve and it is like opening and closing the throttle.  Part #12

[slash]

Bill, why did you remove yours?  It's a good idea in principal.  Also,  I really like the idea of having a fast idle lever like I had on my 04m620.  I was just planning to use an aftermarket cruise controller. Is it possible to retrofit a fast idle lever from an older bike to the throttle bodies on an s2r1000?

Also, I'm not tech savy enough to understand Stew's suggestion to refash the ecu to DP specs. 

[red baron]

slash,

My bike had the same problem, even with the DP ECU I'm running now. The tech that's been servicing my bike lately made some adjustments and it starts kinda hard now when it's cold (i need to keep the throttle cracked a bit for a few minutes) but now it's idle is super stable andit's running better than ever.

[Bill in OKC]

Bill, why did you remove yours?  It's a good idea in principal.  Also,  I really like the idea of having a fast idle lever like I had on my 04m620.  I was just planning to use an aftermarket cruise controller. Is it possible to retrofit a fast idle lever from an older bike to the throttle bodies on an s2r1000?

Also, I'm not tech savy enough to understand Stew's suggestion to refash the ecu to DP specs.

I removed mine because I didn't like the way it looked, never had an idle problem.  I wanted to clean up the engine, hard to do with all the hoses and wires, but I tried.  I also removed the airbox and relocated the radiator overflow bottle.  An idle lever wouldn't work for me because there was not a bracket to hold the extra cable.  The throttle bump from a 996 works ok but it is kind of fiddly to get it adjusted right.  It works with the stock throttle housing - push a button and it bumps the throttle grip a bit.
You can search for the ecu reflash, a forum sponsor can do this for you.
edit:  If you have the DP ecu you don't need a reflash.

edit edit:  You can take the stepper motor off and try to clean it.  Maybe all it needs is a soaking in an ultrasonic cleaner or freed up with some wd 40 or equivalent.  Also make sure the electrical connector is not corroded, if it got wet in there it could be causing problems.

[slash]

Jersey Boy do you or anyone know what kind of adjustment makes the stepper motor run smoother (minimizes it's effect) with consequence of  making the bike a little harder to start when cold.  I think this would solve my problem in combination with a throttlemeister cruise control to keep the idle up until the bike warms up (sort of old school solution).

[Bill in OKC]

The stepper does not have any adjustments, not with the VDST software or any mechanical adjustments.  It either works (properly or poorly) or it doesn't.  If it is disabled - by disconnecting the electrical connector or by plugging the air lines - you'll notice hard cold starts - requiring you to hold the throttle open a bit or a fast idle lever or button - but your idle should be stable once it has warmed up.

[garp2112]

Slash, I may be completely wrong but there may be a much more simple solution...

I recently changed out my stock exhaust to a full system with DP ECU on my S2R1K.  The system idle was terrible BEFORE I had a chance to reset the TPS.  Symptoms were very similar to what you describe; bouncing idle and occasional stall.

Idle and stall problems went away when I reset the TPS and adjusted the idle with a VDST setup.   [moto]   She still starts a little rough when cold but I figure its a small price to pay for the added ponies and fun of a full system.