So I've had my duke for just about a year and it's absolutely fantastic. Recently it's been giving me trouble, I'll let it warm up for a few minutes and drive off. However, it's been bucking, feels like it's running out of gas around 4,000rpms when I hold it right there. And randomly my idle with jump from 1,500rpms up to 3,000rpms and will even jump around there. I have no idea what could be causing the problem. I recently brought it to the shop and they replaced a spark plug saying it was screwed up. Drove fine right when I left, but later that day right back at it. It has a power commander III, could that be a problem? Thanks for ANY help!

Mate do a search and read the part on the big grey plug, most likely that. Pull it appart clean and lube (beat you John).
Don't get sucked in replacing bits before you did this. If yo have a PCIII you have 2 of them so attend both.

Awesome, thank you so much! I'll be looking in to that tomorrow!

Yep.

Just picked up the di-electric greAse, hopefully this works. Also, I have 2 plugs? Will they both be near each other? Eating some breakfast, then to tackle this problem.

Where are you?

Just pulled those bad Larry's apart, cleaned them out pretty good, used isopropyl. Then, packed as much do-electric into them, reconnected and bolted it back together. I'll let you all know if it was a success!

Seems it was only a partial fix. Bikes at least manageable now, no more bucking. However my idling keeps jumping. Could I have incorrectly cleaned it? Other options?

If the idling is still funny and you are sure the plugs are clean the TPS could be off or faulty.
What you need is tuneecu to do the diagnostic if possible. Someone in your area might have the cable, tuneecu can see if the TPS is actually off the mark or faulty.
Watch out before you fiddle with this! The TPS requires a watch makers touch to get right.
Some tips.
1 Make sure it is NOT an electrical connection check wiring loom from throttle bodies to the BGP.
2 use some kind of marking on the TPS before you undo the screws. As mentioned it is precise so use white out and pencil or something so yo ucan get back where you started.
3 Use tuneecu and or a multi meter to set it up.
4 IMPORTANT!!!!! Engine needs to be warm (+4 bars) before any adjustment as otherwise the idle control holds the butterflies open as a choke- coldstart.
5 set TPS on closed throttle, open throttle is almost never 100% so no use trying to get there as the idle will be shit.
6 Closed throttle voltage should be 0.6V and wide open round 3.8V (from the manual, can't remember if correct but do a search on the forum)

No need to use alcohol. You need compressed air (not air in a can...you need 120psi) to blow the connector dry especially on the female side. It needs to be blown out for a solid 5 minutes to force any moisture out through the rubber grommets. As KTMguy said, both connectors if you've got a PCIII. Once dry, pack the female side of the connector by squeezing the grease into the female contacts...you cannot use too much...pack it in there.

Good luck. Will be in Oakland for SX in 1 1/2 weeks if you still do not have it sorted. Will be happy to help.

So my ride home from work just now was awful. My idle was all over the map, bucking came and went. This has become infuriating. So, my new challenge will be to re clean this. Any tips on how to get all that grease I just packed in back out? I didn't have access to compressed air at the time, and wondering if that's the issue. So, any advice on ungreasing? Sorry for all the trouble!

Use contact cleaner...PJ1 makes a good product. Just put a couple old towels under the connector and blast away...it will not leave any residue. Blast out with an air compressor for several minutes and pack with dilectric grease as described. If it were me I would dry out and grease all of your electrical connectors (from the crank position sensor to the injector connectors). The only one requiring serious packing though is the BGC.

Did your bike come equipped with an aftermarket airbox or are you still sporting the stock box?

Sounds like the problem I had, and it wasn't the BGC, it was the TPS. Adjusting that thing took FOREVER. Idk how many times when I screwed it tight again, it moved just a tad and I had to start over lol.

The TPS doesn't move on it's own. If the bike is running good and then all of a sudden is not running good, it's not a result of the TPS moving. It could very well be the signals to/from the TPS getting crossed due to moisture.

It sounds like in this case there are two issues. The BGC for high idle condition and the crank position sensor for the bucking. This is why I suggested the OP dry and lube all of the electrical connectors running to and from the engine. A lot easier with an aftermarket airbox installed.

No he just has an obsession with his BGC. Regardless, There is nothing I can add to this but for you (Jay) to know there is nothing on this bike that money won't fix. Follow KTMGUY he'll have your bike back to running great in no time. You will only need for him to talk in upper equator lingo.Metho?, white spirits, that's just aboriginal jive for firewater.
The blessing with owning a KTM is that all related problems will have three letter diagnostic directions. BGC, TPS, SAS,. You need to study at MIT to fix it or just listen to GUY
Sorry Jay, I cant help.

Funny, you can read my tone without hearing my voice? "My tone" was nice and mellow until your got your ass hair in a knot.

I'm telling you one last time...the high idle is due to moisture in the backshell of the BGC...nothing else. I know this for a fact!

The bucking is probably a result of moisture in the connector to the crank position sensor...this was the same symptom I diagnosed and and sorted on a friends 07 SD. Moisture can confuse electrical signals causing all kinds of weird symptoms. It can cause the crank position sensor to send a signal to the ECU to fire the coil at the wrong time creating unbelievable bucking. Am I positive this is the issue with the OPs bike? No, but neither my friends 07 nor my 08 have exhibited any issues since I sorted the moisture issue. It's been 5 years.

Did you ever stop to consider that as moisture evaporates the running issues subside until moisture is reintroduced into the equation. This can and will drive you mad chasing all kinds of fixes with potentially temporary positive results.

Good luck to the OP. Dribs and B Ass, I don't even know what to say....

Are we trying to help someone or is this the pink tuttu discussion on the one direction forum?
Jay needs is bike to go to work and it runs like crap so keep your kindergarden comments to yourself if you have no help (or at least something funny) to offer or take it to the bieber forum to fight it out you girls.

Skip the sh!t Jay and go to the previous page nothing helpfull on this one yet.

If you can get access to TuneECU I would just check the TPS and make sure the voltage isn't fluctuating. Also checking their aren't any stored FI errors. Moisture in the BGC does cure 99% of these problems but I had 2 TPS sensors fail on my old SD in 50k miles. First one idle would move around and the bike would just stall when ever I came to a halt. 2nd time trouble starting the bike and again didn't like idling, sometimes too high, other times would stall. Eventually bike wouldn't even start. Both showed bad volts but one first one gave FI error light on dash. I'd still be going for totally drying BCG though, lots of air before packing with DG.