F650GS Misfire - Please help

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Osiris

Puppy
Joined
Oct 13, 2010
Messages
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Bike
BMW R1200GS Adventure
A mate of mine has an F650GS (2006) that misfires when it gets hot.  It gets progressively worse until the bike is un-ridable. It happens right throughout the rev range.

It then has to be left to cool down, after which it will start without a problem.  After about 2 or 3 miutes, it starts missing again.

Any ideas?
 
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