Oh and Fred Yamaha put 4 cats in the Gen 2s. The extra two are in the start of the mufflers. It's been talked about with some pics of the honeycomb cats too. That's why the gen2 mufflers are 2lbs heavier each.
So now I've spent way too much time today looking into this. No mention at al of these extra cats in the FSM. I've seen the cats (removed even) in the collection box underneath the bike, but never any of these ones that are supposed to be in the mufflers.
I did find several places that make that statement though; that they are supposedly in there. What's really strange is that the 1st gen mufflers cost exactly the same amount as the second gen ones. If there really were cats in there, don't you think that would drive the cost up?
Then again at 696.80 each...
they could probably afford to include the cats.
Still, I don't see how cats would work back there. The exhaust would be way too cool for them to ever fire up and do anything. Besides if the exhaust has already been through the forward cats, what's left to burn?