OK this is wered and cant seem to figure out why it dose this but when im at wot it seems to go to 5 good and then slows down tell about 6.5 then it just jumps to or past 7 if i dont let of in time and when i do this it seems to have really good power from 6.5-7 i dont know what could cause this. any help would be much apresated thank you

 

Sounds like a fuel delivery issue, like a restriction due toi a clogged filter or carb screen.
If the return line in the carb is compromised at the tank end, this can also cause fuel surging at high RPMs.