possible cdi fault
hi guys looking for help with my 1985 43f 600 , i posted a few weeks ago about resister plug caps . my 43f is running better but still does not start consistantly good like it used to . another problem is at 4000 rpm plus the power surges it used to sometimes do this but it was more of a flat spot and would rev through it no problem , also when i deselarate to change up the gears sometimes there is a small pop through the exhoust , now i am 90% sure this is all carbareter problems but 10% thinks i have a ignition problem hence my consern over resister plug caps . could a bad cdi do this , ive dissmantled the ignition switch and cleaned it and there seemed no problem there just oily gunge in it , so thoughts please guys  this is the first problem since i bought it so reliability has never been a problem up to now . thanks zigzag
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