Can you identify these chambers

[pull the wire]

I viewed the chamber identification page and I would like some help identifying these chambers.

The chrome set, or what used to chrome, are the original chambers that were matched to my Ocelot cylinders in 1973. They just have 2 big cones and have stepped diameter at the exhaust pipe. They start at 1 3/4" at the inlet and about 6" down the pipe they go to 2" and the go into the cone 15 1/2" long and about 4 1/8" diameter. There is not a center section between the cones. The second cone is 9" long and then the silencer 14" long. I'm pretty sure they are Ocelot, I hope. I do know that when this bike was screaming in the '70's to "80's it took on all the KZ900's and 1000's no sweat.

The black pipe I believe is either Bassani or maybe Denco. I bought these in 1992 from a salvage yard. They're in great shape but I want to get the most from my modified engine.

Thanks in advance for your help

[tz375]

Chrome chamber is Ocelot and they are OK but far from great. Jemco are better. Did some simulations for a GT500 with Ocelot pipes and nowhere near as much power as we got with other pipes but I have not tested Ocelot pipes with Ocelot porting to see what that combo does.

The other looks like a J&R at the front but that one has a very short muffler section. Typically J&R had a muffler similar to Bassani but their lengths were all wrong from the analysis we did. That said, I didn't check all the available pipes against every option of port timing but J&R had a reputation for hitting hard at around 5000 and peaking at 6,000 and signing off dead at 6500 that made them difficult to ride. Nice peak but unrideable. Bassani and Jemco give a much wider spread - at least on the simulator.

[pull the wire]

Thanks TZ! I am going to restore the ocelots and give them a try. The times I did get to ride this machine years ago, I remember it had lots of low end torque and an explosive top end range starting at 6000 and up to 8500.