Hey YetiWoodz,
I just bought the exhaust off ebay (your link) and received it today. It is most definitely the real thing! HOLY CRAP!!!! I already had one of the ghetto MZ65 copies so I know the difference. It was a VERY tight fit on my gas tank frame, but OMG!!! Dude, I have SO much low end torque now it makes my clutch slip a litttle!!! Absolutely insane how much this expansion chamber adds!
I am running a PK80 Wildcat(Genuine) balanced 40mm crank, HD lightening ignition, high comp billet cyl head, port/polished cylinder, genuine Dellorto SHA 16 w/ a genuine MZ65 pipe. I cannot wait to take this thing out for a nice long test run tomorrow. Gonna replace my clutch pads first lol. I've been riding/building these for 8 years and have about 14 builds under my belt. Hours of mods, fabrications, learning the hard way, etc. But DAMN do I wish I would have made the investment in this kick ass chamber yearrs ago!
The seller is a TOTAL as***le, so make sure your ducks are in a row if you order from GOMAXIND on ebay