friend in upington with problem

[halfjob]

morning dogs a friend is stuck in upington with his bike which started cutting out intermittently. firstly at big intervals and then progressively worse. he has opened the tank and checked the filter which is fine.
anyone got any idea what else it could be.its a GS 650 twin.
thanks okes

 

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[lowrider]

 

[Wolzac]

 

[halfjob]

 

[Buddy]

 

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[jaybiker]