Simplified Exhaust System - "Expansion Chambers"

Over here in the UK we have an exhaust manufacturer named Predator, which you can look up on the web.
They make a full 6 into 2 stainless system for the 1300 which does not have any "chambers" or boxes, just 3 downpipes into a "3 fork" then onto silencer each side and the bike runs perfectly well as standard with it fitted as I have had 2 1300's with them in the past.
The only draw back is the silencers dont look great as not same shape as stock.

I have also had a few 1300s with original 6 down pipes straight onto short "turn out" straight thru silencers and the bike sounds great with no drop at all in performance as far as I could feel.

Hear mine here.............volume up full as its a treat !!


Pete F
UK

McBoney wrote:

Kawboy wrote: So all those CBX-es I see on Pinterest etc with six into six actually have less BHP than a standard 6 into 2?

Paul

There's a lot of science in it but the pulses in a 3 into 1 system are stronger than the 6 in to 1 so more scavenging happens in the 3 in to 1.

You'll notice that when you remove the original mufflers these bikes still aren't that noisy, so those chambers do indeed provide some silencing, with the mufflers providing a little more. I'm pretty sure the ZN Voyager didn't have those chambers, but then their mufflers aren't of straight-through construction as on the KZ1300. I have a similar set-up to what you're talking about, it's a full stainless 6 into 2 with stubby mufflers. I haven't noticed any changes in power characteristics between the standard system & the one I have now.