2000 Yamaha F40tlry Electrical Problem

Joined
Aug 12, 2017
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1
So I have a 2000 yamaha F40tlry that I picked up and it has some wierd electrical issue it runs good until about 3/4 throttle and then it runs rough. If I disconnect the battery cable then it will run amazing I have tried a new battery and checked for shorts up to the instrument panel along with the controls. It appears that something is pulling on it and making it miss almost. If anyone has any ideas please let me know
 
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