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Part throttle misfire/stumble?
184 posts · Started by BASH69 · 13 Apr 2010
Post 2 by Reb,
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Post 3 by BASH69,
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Post 13 by BASH69,
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Post 14 by Davo-Singapore,
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Post 15 by Lowrance,
#15Thankz 4 all the input guys, i will be checkin thru all the stuff this weekend, i will update if i rectify the problem!
Post 16 by BASH69,
#16You know. This bike has some weird unexplained things that no one seems to be able to figure out. And it happens whether the bike is new used modified or oem stock. Take a look at my attempt to balance my throttle bodies. Now I have done balancing on my now sold VFR800 and all four cylinder were dead on. I'v never done a twin before. Maybe this is normal. Take a look at this youtube vid of my 2008 SDR. Anyway I decided not to adjust. Tell me what you think
http://www.youtube.com/watch?v=LH25FPFqIb4
http://www.youtube.com/watch?v=LH25FPFqIb4
Post 17 by Stupid Luke,
#17Mine started cutting out intermittently or just spluttering. Sometime when I was gassing it and sometime just when I was pootling in traffic. I nearly got wiped out doing a lane change when it cut out two weeks ago and I started losing my nerve. It re-starts okay straight after the cutting out. Took it into my dealer here and he's remapped it but he also said that there was a lot of gunk in the fuel fliter so has sorted that too. So far (fingers crossed) I havent had a repeat of the stalls but I dont know whether it was a mapping or fuelling issue...
Good luck!
Good luck!
Post 18 by Colonel_Klinck,
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Post 19 by Lowrance,
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Post 20 by BASH69,
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Post 21 by ktmguy,
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Post 22 by BASH69,
#22Big,
I am scheduled to be flying into Heathrow on Thursday (then onto Manchester) and was gonna offer to give you a hand depending on your location. Unfortunately Mother Nature has other ideas.
If I make it over the pond and you're still in need of assistance I'd be happy to have a go and see if we can't get your bike sorted.
John
I am scheduled to be flying into Heathrow on Thursday (then onto Manchester) and was gonna offer to give you a hand depending on your location. Unfortunately Mother Nature has other ideas.
If I make it over the pond and you're still in need of assistance I'd be happy to have a go and see if we can't get your bike sorted.
John
Post 23 by BASH69,
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Post 24 by BASH69,
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Post 25 by ktmguy,
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Post 26 by BASH69,
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Post 27 by No. 47,
#27Different symptoms but my erratic running problems, thought to be TPS related, turned out to be air leak(s) at the rubber sleeve(s) between the throttle body and cylinder head intakes - might be worth a check.
Post 28 by BASH69,
#28Already had em off and checked the mate, but thankz for the input!
Post 29 by Davo-Singapore,
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Post 30 by Lowrance,
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Post 31 by BASH69,
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Post 32 by ktmguy,
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Post 33 by BASH69,
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Post 34 by ktmguy,
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Post 35 by BASH69,
#35Thanks for the tips but its all above my head TBH
I dont really no about electrics other than stuff i can follow out of a text book
KTM hav been back on to say that all sensors etc check out perfectly on the Diagnostic tool
Theyve also given me the BS that theyve had reliable information that the way my bike is set up (Motobox, 2nd butterflies removed) that this will give problems like stuttering and cutting out! FFS does it mean nuthin that its runs fine for the last 18months????????
Theyve basically said unless i put it back to stock they cant do anythin with it, so i told em to stick it back together and ill go pik it up
So, here we go again!!!!!!!
I dont really no about electrics other than stuff i can follow out of a text book
KTM hav been back on to say that all sensors etc check out perfectly on the Diagnostic tool
Theyve also given me the BS that theyve had reliable information that the way my bike is set up (Motobox, 2nd butterflies removed) that this will give problems like stuttering and cutting out! FFS does it mean nuthin that its runs fine for the last 18months????????
Theyve basically said unless i put it back to stock they cant do anythin with it, so i told em to stick it back together and ill go pik it up
So, here we go again!!!!!!!
Post 36 by Stratkat,
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Post 37 by BASH69,
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Post 38 by Stratkat,
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Post 39 by Lowrance,
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Post 41 by BASH69,
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Post 42 by Lowrance,
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Post 43 by BASH69,
#43I just had the fuel pump replaced on my 09 SDR.
From start the symptoms were some occasional stumbling and loss of power. After some time the bike wouldn'r rev past 5-6000 rpms.
The dealer measured the fuel pressure and could see it was too low.
With the new pumpo my bike runs great again. I think it has been robbed of some power from the bad pump for quite a while.
This didn't give any error codes...
From start the symptoms were some occasional stumbling and loss of power. After some time the bike wouldn'r rev past 5-6000 rpms.
The dealer measured the fuel pressure and could see it was too low.
With the new pumpo my bike runs great again. I think it has been robbed of some power from the bad pump for quite a while.
This didn't give any error codes...
Post 44 by BASH69,
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Post 45 by ktmguy,
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Post 46 by BASH69,
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Post 47 by Ducati Pete,
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Post 48 by BASH69,
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Post 49 by Ducati Pete,
#49Or all at once, seeing as I need to get on a track in warmish weather to test it out!
Thanks for the plug info BTW - once I had the info I found one on the bay.
Thanks for the plug info BTW - once I had the info I found one on the bay.
Post 50 by ktmguy,
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Post 53 by falcofred,
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Post 57 by BASH69,
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Post 59 by Ducati Pete,
#59I checked those thanks Ash. I made sure they were pushed home correctly, couldn't see all of the hose from every angle but best as I could I checked they were not damaged.
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Post 80 by BASH69,
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Post 81 by Ducati Pete,
#81Yes, after a few minutes leant against the armco she started second time.
Before the next session it took a few attempts to start her, then it out and running well up the straights and through corners where I could keep the throttle open during the entrance phase but doing it's stutter thing in corners where I entered on a closed throttle.
Before the next session it took a few attempts to start her, then it out and running well up the straights and through corners where I could keep the throttle open during the entrance phase but doing it's stutter thing in corners where I entered on a closed throttle.
Post 82 by Ducati Pete,
#82I'm going to the dealers today to get the ECU reset and the akro map reloaded.
Post 83 by Ducati Pete,
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Post 98 by No. 47,
#98Too little time - should get a post mortem from KTM/KTM UK.
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Post 101 by Ducati Pete,
#101fook me - how much did a new set cost you?
I'm still stuck in China at the moment - the BA strike means I'm having trouble getting a earlier flight home than my already booked Friday one.
It's mad to replace the whole throttle body assembly for anything other than diagnostic purposes.
I'm still stuck in China at the moment - the BA strike means I'm having trouble getting a earlier flight home than my already booked Friday one.
It's mad to replace the whole throttle body assembly for anything other than diagnostic purposes.
Post 102 by No. 47,
#102Not when it's under warranty.........................
I will find out, eventually, what component(s) failed and let you know.
I will find out, eventually, what component(s) failed and let you know.
Post 103 by No. 47,
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Post 104 by Ducati Pete,
#104I wish mine was under warranty.
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Post 123 by Ducati Pete,
#123I rode around it at Cadwell, Snett and Brands - you can't commit to a corner properly though, because you never know when you'll have zero throttle when you start to open it up.
It's quite dangerous because if it gives you nothing you really have to stand the bike up a bit, the potential for being rammed from behind* is massive.
Mine does sometimes die and and won't restart - I needed recovery at Brands and Snett.
It's unrideable at Jerez with 3 hard stop corners in 2nd and another in 3rd.
*that should make the quote thread!
It's quite dangerous because if it gives you nothing you really have to stand the bike up a bit, the potential for being rammed from behind* is massive.
Mine does sometimes die and and won't restart - I needed recovery at Brands and Snett.
It's unrideable at Jerez with 3 hard stop corners in 2nd and another in 3rd.
*that should make the quote thread!
Post 124 by BASH69,
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Post 125 by No. 47,
#125My tank has race foam and I have never had any problem like this, irrespective of fuel level - might be worth a try.
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Post 140 by Ducati Pete,
#140Blimey.
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Post 142 by Ducati Pete,
#142I also noticed the pump doesn't have a lower plastic cup like the one pictured below - the casting base comes up further. I can't remember what my other pump is like.
http://i478.photobucket.com/albums/rr14 ... /stock.jpg
http://i478.photobucket.com/albums/rr14 ... /stock.jpg
Post 143 by BASH69,
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Post 150 by Ducati Pete,
#150I've run the bike with the tip sensor disconnected - apart from the fault code, nothing changed.
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Post 154 by Ducati Pete,
#154I checked the TPS - the voltages are pefect to the book
Post 155 by No. 47,
#155So were mine...............
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Post 172 by Ducati Pete,
#172Haven't read the full post - but have you changed the regulator and/or the battery for a known good one ?
Sure sign of problems in this area are the indicators flashing oddly (fast then slow) with engine running but fine with engine off.
I had this and both battery and regulator checked out OK, so couldn't work out which was causing problem so replaced both, runs fine now.
I know this is a different problem to your symptoms but a screwed regulator can have some weird effects with ECU and sensors etc.
Sure sign of problems in this area are the indicators flashing oddly (fast then slow) with engine running but fine with engine off.
I had this and both battery and regulator checked out OK, so couldn't work out which was causing problem so replaced both, runs fine now.
I know this is a different problem to your symptoms but a screwed regulator can have some weird effects with ECU and sensors etc.
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Post 176 by No. 47,
#176Hav a look of Fleabay under Super duke (WITH THE SPACE BETWEEN THE WORDS) theres a few sensors going for around a £10 each if you think they may be the problem!?
Post 177 by BASH69,
#177Thanks Ash. I have sent them a message as some items are not as described though.
What is this? Is it a pick up? They have it listed as a air pressure sensor!
What is this? Is it a pick up? They have it listed as a air pressure sensor!
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Post 182 by Ducati Pete,
#182Took my bike for MOT yesterday and found at low revs on a constant throttle, say 3000, I was getting some stumbles which I never had before.
Hope it's not the start of something
Hope it's not the start of something
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