I had changed numerous parts,checked and rebuilt pulse fuel pump and still have bogging problem on my 250 pro xs. I had seen where the yellow plastic cap on top of flywheel can end up in the air handling Assembly (plenum) and cause similar problems so I looked in there. Dont know if its supposed to have oil in there,which I wouldnt think so but it has a fair amount sitting at the bottom of the plenum. I would think air from the air compressor should be the only thing going through and to the reeds. If thats the case then guess its coming from the compressor and will have to get another one. Any thought on this.
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