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Discussion Starter #1
ok, I've had the cat removed from the OE exhaust on my '05 F4S, but am not in a position to alter the fuelling at present ....... is it safe to ride like that (it seems to run OK, just a bit more "fluffy" at the bottom end) or is there a risk of running it too lean and causing permanent damage?

I have a PCIII I could put on if anyone has a map for a stock bike without a cat?
 

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