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Old 08-25-2013, 07:48 AM   #1
salvadorfrieri OP
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950 sputters and stalls… with the clutch disengaged

So, I've had my 2005 950 S for about a month now, and I'm having a recurrent problem similar to some cases I've read on this forum, but with a twist: the bike sputters, and sometimes it stalls, no matter the speed or the gear, as long as its in gear and the clutch is disengaged. At first it did it once or twice in a day, but it's been getting more recurrent.

When the problem started I took it to the shop; they replaced the fuel pump, they cleaned and did maintenance to the carbs, and they cleaned the tanks when it was in for a paint job, but now its worse; yesterday, as I was running some errands, the bike stalled on me at least 50 times.

The thing is, when I feel it sputtering or choking, if i press the clutch, or put in in neutral, all is good. Once I put it in gear and let go of the clutch immediately it starts to sputter and / or stall.

In the mornings the bike always starts immediately with little need for the choke.

I'd appreciate any ideas from the incredible depth of knowledge within this forum.
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Old 08-25-2013, 11:34 AM   #2
renogeorge
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I would check the sidestand switch. Many fail. This sensor/switch keeps you from riding off with the stand down. It does this by killing the motor if you are not in neutral or have the clutch pulled in with the motor running and stand down.

The switch can be easily disabled if you are comfortable doing without the ride off protection.
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Old 08-25-2013, 05:30 PM   #3
salvadorfrieri OP
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Renogeorge, thanks for the input. This would explain why the bike never sputters or stalls with the clutch engaged or in neutral. I will check this tomorrow for sure! Thank you!

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Old 08-25-2013, 06:29 PM   #4
Sevv
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If that doesn't work try bypassing the clutch switch.
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Old 08-25-2013, 06:50 PM   #5
salvadorfrieri OP
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Quote:
Originally Posted by Sevv View Post
If that doesn't work try bypassing the clutch switch.
Clutch switch? What is that? What does it do? I don't do my own maintenance... But I want to bring some ideas to my mechanic.

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Old 08-25-2013, 09:11 PM   #6
renogeorge
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Clutch switch, neutral sensor and side stand sensor all work together to protect against riding off with stand down. Bike will start and run with stand down if in neutral or in gear with clutch pulled in.
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Old 08-26-2013, 06:24 PM   #7
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Thanks Renogeorge. Today I stopped by the shop on the way home and they cleaned both sensors, but there was no difference. Tomorrow I'll stop again on the way to work and have them bypass the clutch sensor. I'm pretty sure that this is the culprit.

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Old 08-28-2013, 12:08 AM   #8
gefr
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I once had my sidestand loose.

This gave me some trouble, killing the engine.
Another time, the IMS was set too rich. When the engine got hot, it would die whenever the clutch was pulled in.
Good luck and keep us posted.
Cheers.
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Old 08-28-2013, 05:08 AM   #9
salvadorfrieri OP
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Thanks Gefr.

Well, I looks like the culprit is the sidestand switch. I passed by the shop yesterday and the bypassed it. From there I went to the office and ran come errands and came back home and I didn't have a single sputter or stall… it felt so nice to be able to accelerate again!! The dealer here has one sidestand sensor available, so I will pass by this morning and pick it up before anyone else takes it. I´ll install it this evening!

I do hope this is it. I'll keep you posted.
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Old 08-29-2013, 06:06 PM   #10
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Done. Side stand switch replaced. Bike behaving perfectly. I really enjoyed my ride through the city today, coming home I took the longer scenic route. I think I'm starting to click with my bike. Having the peace of mind of knowing that it won't sputter in the next corner really helps!

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Old 08-29-2013, 06:12 PM   #11
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The bad news is I probably won't get to ride much this weekend. We have some protests in the country right now. I shot this video a few hours ago from my apartment. https://www.youtube.com/watch?v=pk0n...e_gdata_player

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Old 08-29-2013, 06:33 PM   #12
Phil in K.C.
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Wow!

Not sure what was going on there!! Was that the Feds or the protesters? Was that a gun shot?
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Old 08-29-2013, 07:02 PM   #13
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Quote:
Originally Posted by Phil in K.C. View Post
Not sure what was going on there!! Was that the Feds or the protesters? Was that a gun shot?
Those were the anti-mutiny police, they were getting organized to continue pursuing some protesters that weren't protesting, just used the protest to riot and get drunk and high... The shot you heard was one of those shotgun-looking things that shoot teargas canisters.

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