BMW R1100GS Flat spot
Hi,
I have a '95 r1100gs with just over 50 000 km, recently it has developed a flat spot, which starts at about 2000 rpm.
Whilst running, it occasionally backfires, but this lack of performance is consistant right up to near red line.
My initial thought was plugs, they're ok.
my next step is to check valve clearances, however it is not indicative of tight clearances.
Any ideas please?
I would appreciate it
Anthony.
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