I am trying to resolve a nasty little backfire issue with my 2005 F4 Ago. The bike has the RG3's and the revised chip installed. On decel the bike has tendancy to backfire (pop loud) through the exhaust. The midpipe on the bike has the bulge where the cat should be. My question is, does the AGO have a cat? I have called Cagiva, Ferracci, Munroe Motors, you know all over. Some say it has a cat and some say it doesn't. If it does I think it might be contributing to my backfire problem (any other suggestions are welcome). The bike has had the TB's check and the chip has been massaged. If it does have a cat I am planning on buying the Ti midpipe for the bike. Best I can gather from the MV site is that the bike only came with the RG3 pipes and the chip, no midpipe. Does anyone have an answer based on fact? Thank you for your time.