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My 02 sensor is done. It's been severed somehow due to the previous owner either dropping it or purposely trying to cut it. He was a pretty clueless owner...

Does that explain why my exhaust and sensor is covered in black soot? It's horrible. My friend tells me that it's been running super rich the entire time. That explains my rough idle? It sounds like a big block chevy that's been cammed. But I've also read on forums that unless I get a power commander module and remap, it's the upgraded exhaust that causes the weird idle. Does getting an aftermarket exhaust really make the bike run rich? I thought it would make it run leaner! Can I fix this problem by deleting the 02 sensor with a plug to "fool" the 02 sensor? I've seen some on sale where it's just a plug and play and it supposedly does the job.
 
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