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My 2000 yamaha gp1200r runs perfectly fine and has perfect top speed once it gets going.. My problem is the take off, When im completely stoped and give it the full throttle the engine sounds like its working hard to get the starting speed after that it just takes off perfect and if im actually moving at the speed of 10mph on the speed gauge and hit full throttle it catches the speed instantly with no problem... What could be the cause of this?... I thought it would be the wear ring but it actually looks good. What are some other cause of this problem?
 

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I have the same exact boat as you that does the same thing. These GPRs cavitate a little, a pump seal kit does the trick. I am planning on doing it this winter.
 
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