Rough Running K1200S

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mightyapu
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Rough Running K1200S

Postby mightyapu » Fri May 11, 2018 5:03 pm

Hi there

I got about a mile down the road the other day when the bike started to gurgle a little, a bit like a throaty cough & feel down on power. I rode it a bit more but it didn't clear or improve. The only noticeable change seemed to be when the bike was over 3k revs where it seemed to be struggling a little less. i'm going to check the coils & plugs for starters, but having not run on 3 cylinders before i'm not really sure why the bike would seem to run better over 3k revs. I'd have thought it'd be bad consistently. If anyone has any other ideas it'd be mightily appreciated.

Cheers!

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SteveD
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Re: Rough Running K1200S

Postby SteveD » Sun May 13, 2018 11:45 am

What've you found?
Cheers, Steve.
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mightyapu
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Re: Rough Running K1200S

Postby mightyapu » Sun Jul 01, 2018 6:49 pm

I’ve had the plugs and the coils off, done some resistance checks and they all seem ok. There was some heat damage to one of the connectors so I’ve replaced that. I’ve chucked some stp in the tank and given it a good blast, I’ve also disconnected the O2 sensor to see if that made any difference... it didn’t. Still snotty and backfiring up to 3k rpm...then pretty happy after it. Any ideas on what to try next welcome 🙏 8)

Cheers

Will

Mike D
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Re: Rough Running K1200S

Postby Mike D » Sun Jul 01, 2018 6:57 pm

Have you had any diagnostic kit e.g. a GS-911plugged in to see what it shows (if anything).

Mike

mightyapu
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Re: Rough Running K1200S

Postby mightyapu » Sun Jul 01, 2018 8:02 pm

Unfortunately not, apart from a standing rear lamp fault (due to previous owners led conversion) there’s also nothing else on the display showing a fault.

Mike D
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Re: Rough Running K1200S

Postby Mike D » Mon Jul 02, 2018 1:04 pm

Then I suggest a GS-911 check to see what is stored. You can also use it to reset the adaptations (variable values stored in the ECU, which are created as you ride the bike).A reset will put them back to a known baseline.

Where about are you in the UK?

Mike

mightyapu
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Re: Rough Running K1200S

Postby mightyapu » Mon Jul 02, 2018 10:23 pm

Over by ingleton, just on the edge of North Yorkshire and Lancashire. I’ll look into the gs-911 and try and make sure I get the right one. The fault on the light isn’t isn’t hard standing, it just thinks the (original) bulb has blown whereas the led is quite happily shining away. I can change the connections so that the fault goes away, but so does the light 8)

Mike D
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Re: Rough Running K1200S

Postby Mike D » Mon Jul 02, 2018 11:57 pm

Rather than investing in a new device, it may be worth you joining The BMW Club, as they have a few GS-911 devices for hire.

Mike


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