Dual exhaust? - Kawasaki Versys Forum
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post #1 of 3 (permalink) Old 05-28-2018, 07:22 PM Thread Starter
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Dual exhaust?

OK, sorry if this has been talked about. I did look to see but couldn't find anything...

I got a 07 Versys, and wanna make my own dual exhaust. I have done some research about it. The main concern I have is the back pressure effecting the engine. My plan is to make two pipes with two glasspacks, then either make my own exhaust tips or buy some Toce/whatever looks cool.

Just looking for advice and knowledge. (Also my bike isn't a new enough model that it has the gauge thingy attached to the pipes (co2 reader?)). Don't wanna kill my engine, but if the effects are minimal I'll probably do it.
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post #2 of 3 (permalink) Old 05-28-2018, 07:49 PM
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Originally Posted by k-bru View Post
OK, sorry if this has been talked about. I did look to see but couldn't find anything...

I got a 07 Versys, and wanna make my own dual exhaust. I have done some research about it. The main concern I have is the back pressure effecting the engine. My plan is to make two pipes with two glasspacks, then either make my own exhaust tips or buy some Toce/whatever looks cool.

Just looking for advice and knowledge. (Also my bike isn't a new enough model that it has the gauge thingy attached to the pipes (co2 reader?)). Don't wanna kill my engine, but if the effects are minimal I'll probably do it.
From what I have read on the subject, altering back pressure via an exhaust modification, has no real effect UNLESS there is also a corresponding change in fueling. This means installing a Power Commander and coming up with a fuel map for the characteristics of your fabricated exhaust, which also means dyno testing and refinement of the fuel map. Given the physical restrictions of the bike a dual exhaust might be out of the question. I think from the cost/performance benefit you might be better off with a aftermarket exhaust that comes with an existing fuel map you can download rather than developing your own on a dyno unless you have low cost access to one.
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Last edited by twowheels; 05-28-2018 at 07:52 PM.
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post #3 of 3 (permalink) Old 05-29-2018, 12:13 PM
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...(Also my bike isn't a new enough model that it has the gauge thingy attached to the pipes (co2 reader?))....
It's an OXYGEN sensor, which changes the fuel injection from OPEN-LOOP (your '07) to CLOSED-LOOP, which means it samples pressure altitude, etc, then sets the appropriate fueling. I get WAY better mileage from my '15 (CLOSED-LOOP) then on my '08 (OPEN-LOOP).
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