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go back to 38/120 on the nibbi.
check all the jet orifaces and use a can of carb cleaner to make sure all the carb passages are clear...
get a new CDI, coil and Spark plug...
put the A/F at 2 turns.
Put the idle a hair open.
start the bike and tune the A/F. enough to get the bike up to temp then dial in A/F and idle . you should not even be touching the throttle yet....
Once that's sorted you can move onto ride ability tuning...
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