fast idle

Hi, I'm having a few running issues and i'm hoping someone can help out

09 SDR, standard
1500km had its first service ontime at 1000km

Just started happening three days ago, the bike warms up just fine, idling normally on 1500 odd rpm as per usual. At running temp when i get off the throttle from any type of riding, the bike slowly returns to 3000rpm when the clutch is pulled, when engaged it wants to push me through corners. when i come to a stop the revs stay at 3000rpm sometimes and other times takes about 10 seconds or so to return to 1800odd rpm. If i immediately pull over, turn the key off and back on and restart the bike, it idles normally at 1500 rpm again but once i take off again, it resumes the high idle.
The throttle is not sticky , the butterflies snap shut when the throttle is closed,
Is this an ECU malfunction?
before any of this when i got off the throttle and pulled the clutch the revs would instantly drop to idle within a second or less.
I am dropping it off to the dealer on Monday to get another oil and water leak fixed, would a ECU reset likely fix this?

secondly
its just started stalling out on me, happened whilst riding the other day slowing down for a red light, wouldn't restart, sounded like it was trying to run on only one cylinder? had to turn the key off and then back on again, ran just fine, now thats only just started happening in the last 200km, has happened a few times since but thats usually just on warm up,
i've read this is a common problem, just like confirmation plz.

Thanks

Thanks for the reply chop
seems the problem is now fixed
now i've read on multiple forums that disconnecting the battery doesn't do a thing at all, the ecu doesn't learn etc etc, well thought it couldn't hurt to do it, did and problem gone,
pretty weird but hey whatevs its all fixed, thanks for readin anyway
glad i have my awesome bike back

I suppose we should be thankful that microshite has nothing to do with the ECUs. But if they did.......

Oh the joy of riding 100 yards between crashes, having to update the virus software all the time and all the other crap they make you spend your cash on

Well I'm tired of dealing with this crap. The problem is getting worse and more consistent so hopefully I'll be able to demonstrate it for the mechanic. I'm taking it to the shop I bought it from (Three Bros Racing in Temecula). I talked to Andre and he said no worries, bring it in and whatever the problem is well get it sorted even if parts are not in stock and it involves pulling parts off of his personal SD.

It appears to be ECU or idle control circuit related.

I'll post up with any results we come up with. Wish me luck!

John

Funny, I thought it seemed to get worse after a good washing but thought it was my imagination. Especially now as it's doing it more or less all the time.

You are the second person to mention a low battery as a possible cause so I pulled the battery, cleaned all terminals and checked the voltage and all is well. Batt voltage is at 14V.

How high has your idle gone after washing it? Mine will hang at 4K sometimes. This isn't at start-up but after I've been riding for a while (20 minutes or so). I'll come to an intersection idle will be hanging at 2-4K, hit the kill switch, fire it back up and it idles at 1.5K (as it should) until I get to the next intersection.

PITA!

I would check the rubber hoses to the map sensors and also take the airbox lid and airfilter out and have a close look at the butterflies (the bottom ones) especially the rear one which is controlled by the balance screw from the first one. While you're there check trottle cable movements and hoses.
My guess it is an air leak or open butterfly, it is unlikely to be fuel related as more fuel without extra air doesn't result in higher idle.
Another possibility is the temperature sensor, if the ecu thinks the engine is still cold it will increase the idle. Worth a look but hard to check. This could be influenced by washing the bike, I had problems with electrical connectors also. Stay away from your SD with a high pressure hose! My mate is on his 3rd dash for his SDR and he hasn't learned yet.
Good luck!

Ok, vent your frustration somewhere by phoning the stealer or chopping firewood....
Then lets solve the problem. Start with:
Check the connections to the cooland temperature sensor. You find all the information for this in chapter 7 of the LC8 workshop manual which you can download from a link somewhere else on the forum.
If the connections are ok, check the sensor itself by either measuring the values listed on page 7/39 of the manual. You need a multimetre for this and a pot with hot water or a way to check the engine temperature if you want to leave the sensor in place. A temp probe of any kind with celcius reading will do.
Laternatively you can "borrow" a sensor from a mates bike. Do the same for the air temp sensor in the airbox. If you have a motobox installed and the problem started then I would have a very close look at the temp sensor there. Hope you find the issue, too good a bike to trow down the road.

Hi Lowrance, Good to hear the problem is solved. I know SD don't like water and I mentioned this before, a mate of mine is on his 3rd dash as he likes his waterblaster... (more than his SDR???weird)
Watch out with silicon to seal plugs and wires, some silicon has acid in it (vinigar smell) and will corrode all copper quickly. Make sure to use a neutral cure one or pack the connector with petrol jelly.