S2R1000 air bypass screw difference in setting

[WetDuc]

Well its still hunting idle when hot.   I really hate the whole stepper system.   
Can someone comment if it's normal for the TPS setting to fluctuate slightly while the bike idles?
Also, my vacuum hoses of the stepper system are not hose clamped.  I was thinking of maybe trying to snug the hose connections to see if there is a difference. 
Thanks for any help.

[Howie]

I think some variation is normal, as long as it stays in range there should be no problem.

Snugging 'em up can't hurt.  Was it hunting when the screws were even? 

[WetDuc]

Yea, it was hunting with both out 1/4 turn.  It seems I can settle the idle more easily with some throttle coaching when one screw is closed and the other is open half a turn.

[WetDuc]

I don't see any obvious air leaks, but its still hunting.  Today on my ride home it started hunting at a stoplight, but after I got home I tried a restart with bike still hot and it didn't hunt, idled fine.   I really don't understand why it's intermittent. 

[WetDuc]

The bike is still hunting intermittently, usually when the engine temp is above 160F.
I've got to get my ducs in a row getting ready for some upcoming maintenance so for now, things are going to stay as they are on my bike.
I appreciate all the input given on this thread!  Thanks guys.

[Howie]

Try to find someone with an exhaust analyzer after you do the service if the problem persists.  Since you are running a DP ECU I am surprised you are having this problem.

Oh, do look at valve guide clearance while you do the service.  This could (hope not) be your problem.

[WetDuc]

Valve guides have been a suspicion of mine considering the limited history I know about the bike and the numerous similar stories online.
In order to replace valve guides, it's necessary to pull the heads, isn't it?

The hunting is not as bad with my trimmer set a tad lower, but I still have to quell it with throttle coaching.


I'm at 6900 miles now, so I'll be diving in for the first time probably around January to do the service. 
I've got most of the tools I need, and am planning to rent a kit from ducatitoolrental.com for the rest of the stuff including the shim kit.
I just gota figure out where to find a gastester, although I see that ducatitoolrental.com actually has a gastester that can be rented.

[Howie]

Heads need to be pulled, guides need to be reamed after install and seats ground.   Ducati did have a known guide problem on some liter engines.  You might get some "good will".  Contact them.  If your dealer is good, do it through them.

The reason I didn't mention guides before is I don't think the guides are as much an issue if you are running open loop.  Since you are adjusting your valves this is just the perfect opportunity to check  .I still think adjustment will solve your problem.  Wiggle your exhaust valves in the direction of the rocker arm. Measure with a dial indicator.  Half of that is your clearance.  

Ducati tool rental?  Definitely post your experience with them.

[WetDuc]

I'm hoping it's not the valve guides...

I contacted the dealer about the valve guides and he is checking to see if there is a VIN connected recall or bulletin of any kind.  I'm pretty sure they would not be willing to check, but if I know the guides are bad I may pursue some "good will" service from DNA (I really hope it doesn't have to go there).  Bike doesn't leak oil or smoke noticeably.

I will most definitely report back about how the tool rental goes.

Thanks for all the info, howie.