The inlet and outlets were the same diameter. I can't remember exactly what the problem was...it was either the slight size difference of the filters or one if the inlets/outlets were angled slightly. Anyway, it will work. I had purchased the gas tank gasket and a valve cover gasket well in advance knowing I might use them at some point in time. I don't believe you need the service software to simply bleed the brakes unless the ABS modulator has been serviced or has trapped air. I bought some software call, I think "Dealer Service Tool". I have never used it. If I am reading the manual correctly, you bleed the brakes the same as a non ABS bike. The manual speaks about using the tool/software to remove trapped air. Sounds like a pain. I prefer not to think about the valve clearance check at 20,000. I think I will continue to run it for a bit beyond that point. I'm about 5,000 short at the moment. Definitely thinking about selling my bike sometime this summer or trading it off for something different. Love the bike, but at 76 it is a little heavy for me at walking speed. I'm getting a little concerned about parts and the bike being an orphan.