SD 990 Cutting out

Had an interim service after buying bike a few months ago and the guys removed a few parts they say were only for emissions / homoligation from airbox plus baffles to allow it to breath better/ produce more power.

Leo Vince exhausts

Bike ran fantastically immediately afterwards.

Then it sat for a month or so and now have an intermittent problem with it cutting out.

Used 2 tanks of Shell RON 98 after being stood so its not old or cheap fuel.

Happens when I come off the throttle completely at junctions etc.


Starts immediately.

I'm keeping more revs on to avoid it but now had it cut out when setting off.

Shop had a look and it cut out just once as he had it stood blipping throttle and releasing.

Suggested running couple more tanks of 98 through but problem still exists.

I have no service record to identify if spark plugs or timing belts have been changed

2006 SD990 with 41,000 KILOMETRES (not miles)

Garage advice is to change plugs.

Any advice welcomed.

Does it require ECU remap following removal of baffles.

Lack of information on service / change of timing belts has me considering replacing them for peace of mind although am told will be expensive

So just some standard stuff to check.

BCG (Big Grey Connector) on the right side of the bike. Check for dirt/moisture and pack in some dielectric grease.

Tip over sensor behind the headlamp.

Side stand switch.

That's all I can think of right now.

Comrade: Just adding to the quick list:
Fuel filter, Breather, Earth, Retifier.

Don't mess with remap until you find the problem.

I would ad check TPS (throttle position sensors)

Clutch switch.

Cold or warm?

Mine will do it when cold if I don't blip the throttle. Goes away after good and warm.

Rob

Mine cuts out sometimes when pulling the clutch in and blipping the throttle at the same time. It'll happen once only and I just restart the bike straight away while I'm still rolling....it rarely occurs and can go for a few weeks without experiencing it. I can't easily replicate the behaviour no matter what combinations I try and its more likely to do it when not quite 100% warmed up.

An Epic Tail

Back-story:
Have recently adopted a 2005 KTM 990 Super Duke. I bought it on line, from a well known motorcycle franchise, in Southwest Brisbane. It was trucked up, to FNQ, for only a few gold bars. On delivery the bike wouldn't start. Bat flattery. Thanks a lot guys.
SD battery box access difficulties are well documented elsewhere. It is quite a trick though, so while there, I installed an easy access plug for a trickle charger. Followed a forum's suggestion - Attach positive lead to starter terminal and negative to an engine bolt. Now starts very easily with zero throttle. Idle races up to about 2000 RPM but, over time, it settles to about 1500 RPM.

Present Problem:
During a pleasant sunny morning ride, I got a very rude awakening. About 60 km after a quick fuel stop, the engine stalled and the rear wheel locked up. The bike fish-tailed back and forth, left lock, right lock, ditto, ditto. Pressed the starter button a few times, while rolling along with the clutch in, but no-go. It was peak-hour traffic. I managed to squeeze onto the road's edge, as the blind drivers closed up into my gap. Shortly after it started and I managed to ride into town.
Had many short stops to make. The idle dropped below 1000 RPM and often stalled at the lights. Some what dangerous and not just a little embarrassing. Though not improving my feelings, began revving the engine, to keep from stalling while at rest. Don't you just love those opened Akrapovic cans?
On my return journey, I refuelled again. Managed about 200 km on this tank. About 5 km later, while travelling at about 90 km/h on a quiet country road, the bike stalled again. This time the rear wheel did not lock. The speedo clock, went into start up mode, letting me know what size tyre I had on the front, etc. Again it started easily and continued without any further problems.
Am now very wary, of any spirited riding, should she buck again.

Question:
My problem sounds very familiar and almost shoe fits evojack's experience.
Was there success with repairing this fault? Anything to do with the battery terminals?
Did someone discover it to be an other problem? Am keen to discover a solution?
"15 minute idle trick?"

Cheers

RR

Any warning lights ?

Mine is doing this, but the FI light flashes momentarily and sometimes the dash goes off (similar to hitting the kill switch)
I'm currently working my way through the connectors.

Miff.

Could be the same thing that is happening to the KTM 990 ADV bikes.
I know of two bike that have this problem.
The key switch wire is failing from flexing too much / not e-nuf service loop / length of wire.

To test next time, move the bars back and forth and see if you make contact with the broken wires.
One of the bikes wire broke about 1.5 inch (38mm) from the key switch.
The other broke inside the key switch.
Wire manufactures make a flex wire to be used where wires will flex.
I am not sure if KTM used flex wire.

Feel the wire in question for any broken wires inside the sheathing.

Having experience with 2 stroke bikes, my left hand is ALWAYS READY TO PULL THE CLUTCH IN WHEN /IF THE ENGINE REAR WHEEL LOCKS UP......

I cannot add much information that will help. I am reading this thread with much anticipation. I am waiting for a post that says that if you just wait a certain length of time the problem seems to fix itself. The last time my SD was out for a spin was months ago. I took it the back way to get a haircut which was good for the barber because my hair was standing up in the back making it easier for him. On my way home the bike cut out and I pulled over. It restarted and I then rode maybe another two miles and it cut out again and again and again always restarting till I made it home in four cut outs in fifteen miles. I pulled it into the far stall of the garage, hooked up the battery tender, and covered it with and old sheet. This bike as spent way too much time repairing itself. I get roughly 20 miles between six month healing intervals. The saving grace is I have more bikes than I can either afford and or ride and the SD seems to recalibrate the miles back to zero whenever it feels that it has healed itself to new again. currently it is sitting at 157 miles on the odometer. The trouble with all this wonderful input relating to possible fixes is it is electrical in nature and therefore cannot be fixed with a hammer and a hammer is the only thing I want to take to this worthless pile of orangeness right now.
I'd trade it in for a still life painting of my carpenters bags and would get the same enjoyment in viewing pleasure.

evojack wrote : I have no service record to identify if spark plugs or timing belts have been changed.

Doors open here........The reason you don't have any record of timing belt replacement is.................the KTM 990 LC8 does not have any rubber bands to tune.

I got 33K on mine with original spark plugs...

DD....how many miles on your SD ?

Get much salt air ?

What do you think about the wires flexing / breaking at the key switch?

Can do a pen / ink old school technical drawing of your bike for trade...

Mine still draws lookers at bike night..