Fuel starvation / stutter at speed

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the_wes

Grey Hound
Joined
Jan 10, 2007
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Location
Brackenfell, Cape Town
Bike
Harley Davidson (all models)
Airhead gurus help!

My Dad's R100RT is stuttering / spluttering at high speed. Well, "high" speed - revs fine until you're in 5th and doing between 120-140, then as soon as it hits anywhere between 4500 and 5000 RPM it starts "stuttering". I am convinced it's a fuel starvation issue (can't get the fuel through quick enough) but how to sort it out?

Any ideas?
 
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