The Goats Belly Pre-Muffler what's inside and why
Okay, so I've searched this forum and found no real answer to the above question, and lot's of speculation about sound deadening material and a cat converter being inside. No cut-away pictures that I could Google. Today I was at our local bike graveyard and spotted a mangled 2000 VN750. I offered the yard owner $10 bucks, he said it was worth $30 and I said I was just gonna cut the f'er up to look inside, he said BS, I said I'll do it right here right now, he said prove it and I'll charge you $10 bucks.
So I got the saw out of the truck and split it lengthwise across the weld. What's inside is a) on the left intake is a 9 inch pipe with a reverse gentle 90, this balances the exhaust pipe length from the rear cylinder to the front length and directs the gas flow back towards the right side outlet, b) there's a 2 inch stub on the right side for the front cyl that dumps straight into the chamber, and on the rear exit of both sides is a 2 " stub leading to the muffler clamps.
No packing, no cat converter or baffle plates like on the VN800 and beyond. Keep in mind this was on a 2000 model.
So the pre-muffler balances the exhaust lengths and the chamber provides an early pressure reduction before the exhaust hits the muffler baffles.
We were all laughing so hard at why I was doing this in the junk yard that I forgot to take at least a phone camera pic!
Now you should be able to understand why there IS a power loss when you de-goat, and you should be able to figure out why the carb mixture will be off and near impossible to balance without fiddling with all the jets and the slide vacuum ports, and you should be able to figure out why it's not a great idea even if you add an H-pipe which won't balance the exhaust path (but that's better than just what you see in the Verses, for sure!)
Turns out the Kawasaki engineers aren't as dumb as a redneck with a hacksaw.