Another Goat belly - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 6 (permalink) Old 01-29-2019, 10:26 PM Thread Starter
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H pipe confusion

Quick question. Heard a lot of people talking about welding a pipe between the two exhaust pipes after the goat belly removal. What is the point in that? Sound? Performance? Just kinda curious to know the logic behind it

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post #2 of 6 (permalink) Old 01-30-2019, 01:16 AM
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I've seen no need for it
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post #3 of 6 (permalink) Old 01-30-2019, 06:58 PM
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It's a crossover, theory is a sharing of exhaust/vacuum pulses that help keep exhaust gas velocity up and help empty the combustion Chambers wall the opposite exhaust valve is open... Sometimes called exhaust scavenging.
A true X-pipe would be the only way to gain enough scavenging across a wide enough RPM band to reap any real world benefit.
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post #4 of 6 (permalink) Old 01-30-2019, 07:50 PM
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It helps on V8s, on V-twins, not so much.
Harley did it some engines.

Not really worth it unless you're drag racing for money.

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post #5 of 6 (permalink) Old 02-08-2019, 09:52 PM
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https://www.enginelabs.com/engine-te...gn-and-theory/

I suggest this as a read, it pretty much explains everything about exhaust in vehicles.

Unless you are going for performance, having a merge pipe or crossover is usually good for balancing or smoothing out the exhaust sound.
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post #6 of 6 (permalink) Old 02-15-2019, 04:03 PM
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On the topic of goats... I just took mine off and crossed the rear exhaust to the right side. I used two right angle pipes and will have a shop weld in a y pipe I cut and a cheapo emgo muffler. As it sits both exhaust are the same length and are waiting till Monday. Has anyone else done a 2 -1 have any of you ran the 750 with just pipes? I'm questioning if it would be alright to ride around still.
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