S2R Problems

[hackers2r]

So after the bike spent a while at the dealer, they said the random misfires may be the Nemesis ECU and told me to try the factory ECU.  I swapped ECUs only to have it happen again a day later.  I called them again and they suggested trying to bypass the kickstand switch and see what happens.  Tried this yesterday and when I rode the bike today it happened twice more.  Any more suggestions?  There are no CEL either.  Gauges stay on through the problems as well.  Bike is an 07 S2R 800.

[MotoCreations]

mis-fires purely at random?  Or on acceleration; decleration or steady-state throttle?

[hackers2r]

Random...have happened at all throttle positions.

[stopintime]

That is the ONLY problem I've had with my bike (same).
It happened only once - new plugs fixed it. Try that?

[booger]

Check the 13mm engine ground underneath the rear brake reservoir. It only has to be a little bit loose to cause trouble. Free and easy and if it fixes it then bonus [moto]

[hackers2r]

I haven't.  I am assuming though that that would throw a CEL?  Also, wouldn't the dealer have checked that?

[hackers2r]

I'm gonna check that ground now.  I REALLY don't think it is that as the gauges never lose power during this. 

[booger]

I'm gonna check that ground now.  I REALLY don't think it is that as the gauges never lose power during this. 

Yeah, my guages never lost power either when I was having similar troubles but the engine ground was loose. Tightening the 13mm bolt fixed it. Might not be your problem but wouldn't it be great it it were?

[hackers2r]

Out of curiousity...that damn ground is filthy.  I'm looking at cleaning it.  Anything I should do before loosening this?  But it was thoroughly tightened. 

[booger]

Wire brush the bolt with some WD40 and put a little copper antisieze paste on it if you have some. Also clean the wire terminator and ground point on the case. Get that connection spotless and corrosion-free so you can rule it out completely.
Dealer used the Ducati diagnostic computer on my bike when it was firing on one cylinder - code came back 'communication fail from ECU to coil'. After some headscratching he found the engine ground loose and tightened it. He then took the bike out and flogged it on the freeway, came back and pronounced it fixed.
This may not be your issue, but it goes to show how sensitive the electricals are.
Random misfires can be really difficult to diagnose. I had a repeatable cough from the airbox at ~3500rpm that was only solved after a valve adjustment. Could just as easily have been something electrical.
BTW I have the same bike as you, a year older.

[hackers2r]

Do I need to disconnect anything?

[booger]

I don't see why you should have to disconnect anything.

[hackers2r]

In another post, it is mentioned that I should disconnect the negative terminal of the battery.  Anyone?  Or should I just unscrew, clean and reattach with bike off of course.

[battlecry]

You should be fine. 

[hackers2r]

Well I cleaned the connection as described and reattached. Just went on a ride and it is still happening!!!  Any other ideas?  Also, if it were spark plugs, wouldn't this be much more frequent?  Thanks.