Question about BMW K 1200 GT Motorcycles

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K1200gt head apparently needs shimms at huge cost accourding to the mechanic it has low compression but it runs beautiful,, no oil loss or tappet noise either, this was at the 100000 Kilometer service. He said there is no adjustment in the shims.

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Mike

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Well, the shim adjustment must be done, the question is are you too late? I presume that you are talking about valve shims, which is how the valves are adjusted. Valves work their way into the head, over time, and this closes the clearance, when you hold the valve slightly open, the valve and seat get damaged.This is the time to fix the low compression cylinder, as it will only deteriorate more from this point. Likely a valve issue...And it appears that is what your mechanic is indication. NO MORE adjustment means that the valve has worked its way into the head too far. Valve job time. Sorry.

Posted on Jan 22, 2012

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the tappets
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