Over the past month and a half my xl760 has been giving me a problem where if im going at 4000 rpms or less and i give it full throttle it bogs down and dies. It idles fine and if i ease into it it runs fine. I have also put new plugs in it twice this year, rebuilt the carbs twice, checked the compression (145 and 137), and changed my prop. I would love to get this ski going and would really appreciate any help. Thanks in advance.