K11 Owners Group

CheapJapCopy · Posted: Thu Jun 26, 2008 1:01 pm Post subject: Burnt valve

One of my valves has burnt out Sad

She kept running though, so at least I wasn't left by the roadside.. Not as much of a disaster as it could have been though, because I was going to swap the head over anyway, due to the oil consumption..

One thing after another, this bike was made on a Friday or Monday..
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1992 K1100RS - Red and gold.

Technician · Posted: Thu Jun 26, 2008 1:37 pm Post subject:

Was it by any chance No2 exhaust and what sort of milage?
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CheapJapCopy · Posted: Thu Jun 26, 2008 3:04 pm Post subject:

Hi there, don't know as yet which one it is, just that the exhaust sucks instead of blows on one of the cycles.. It's in the menders at the moment.

I have approx 50k miles, it happened while overtaking at high revs.
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1992 K1100RS - Red and gold.

Flying Duck · Posted: Thu Jun 26, 2008 3:05 pm Post subject:

Do yuo know when the vavles were last checked/adjusted, if ever?
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CheapJapCopy · Posted: Thu Jun 26, 2008 3:12 pm Post subject:

In theory they were checked at the 30k BMW service, but I wasn't there, all I have is the stamp in the book.. For all I know, they never were.

At the end of the day, it happens. My colleague's ZX12R just had the exact same thing at 10k miles, and I ended up with one years ago on a CX500, though that ended with a sculpture named "Valve (with piston)" Laughing

Maybe a stem seal had gone, causing a hotspot, and the smoke I'd been getting, maybe it was just bad luck, but I'll be glad to get the head changed over.
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1992 K1100RS - Red and gold.

Tim (Midland Section) · Posted: Thu Jun 26, 2008 5:07 pm Post subject:

Sorry to hear that CJC,

CheapJapCopy · Posted: Sat Jun 28, 2008 8:37 am Post subject:

I take it all back, it wasn't a burnt valve, one spark plug had completely failed! New plugs and it's running like a dream. And Russ at Bemer Bikes was good enough not to charge the earth for finding this out and replacing all of them. We still puzzled over the wierd exhaust behaviour, but noone can deny these are quirky bikes..

By the way, have any Brits here got an exhaust going spare? Mine's started to blow again and Motorworks want 180UKP for their second hand example, which is extortionate in my view. Willing to pay good money for a decent one though.

Cheers!
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1992 K1100RS - Red and gold.

DaveVoorhis · Posted: Sat Jun 28, 2008 9:21 am Post subject:

CheapJapCopy · Posted: Sat Jun 28, 2008 9:34 am Post subject:

You are too kind sir, thanks! Very Happy

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1992 K1100RS - Red and gold.

chopper_harris · Posted: Sat Jun 28, 2008 4:10 pm Post subject:

That would be the one I posted in the 'For Sale' section, on Friday afternoon Wink

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