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Fuel Pump Issue

Kawasaki Vulcan 1600 Nomad (2008), with 72,000km (43,000miles), Bike has completed several long distance rides each season, use 93 octane gas.

The problem started about a week ago, when traveling at 110km/h (70mph) the RPM is about 3,000, when accelerating (full throttle twist) to pass a truck etc, the bike “retards”, ie reduces speed, and the RPM’s never go pass 3,000 in 5th gear. Had the bike in for service, but they are reluctant to replace the pump yet due to cost $$.

One other thought could the Baron Tach cause these problems, my service tech said one needs to eliminate all avenues.

Anyone have a same situation and have any advice on a fix?, I am not opposed to a new pump, but the cost is high so it better fix the issue. I don’t think it is bad gas as I have had several tank fulls since the problem started.
 

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The fifth gear in a 1600 nomad is like a overdrive you need to kick it down to forth or third gear for passing...
 

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Hello, new member. My 07 Mean Streak was cutting out similar to what your bike is doing. Took over a year of replacing perfectly good parts, till I finally stumbled on to what seemed to be causing my problem. The wiring from the VSS (vehicle speed sensor) to the main wiring harness had an intermittent problem. On my bike the VSS signal can cause the engine speed to be reduced or limited. A problem with the VSS does not cause a trouble code to illuminate the FI warning light.
 
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