Sounds like youre very weak for some reason. If you mean the bike is pinking under load (like going up a hill) and its worse in higher gears try leaving the choak on alittle and see if that helps. If it does then you know you need to set about re jetting the carbs and/or giving them a good clean out.

Another good way to tell if your lean is if the bike starts to loose power, try rolling off the throttle alittle. If this helps and the bike starts to pull stronger again. Youre lean lol
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If I have to take the carbs off once more...