Cross over exhaust


Technical information and Q&A applicable to all years and models of Goldwings
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Bob Kennedy
Posts: 4
Joined: Thu Feb 04, 2010 2:19 pm
Location: Vancouver, WA
Motorcycle: 1984 GL1200 Aspencade

Cross over exhaust

Postby Bob Kennedy » Fri Mar 19, 2010 10:50 am



I have a 1984 GL 1200 Aspencade. Can you replace the mufflers not using the cross over exhaust? What is the cross over exhaust for?



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WingAdmin
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Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
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1998 XV250 Virago (sold)
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Re: Cross over exhaust

Postby WingAdmin » Fri Mar 19, 2010 11:07 am

You can, and people certainly have. It aids in scavenging exhaust gases out of the cylinders, utilizing the back side of the pulse from the cylinders on the opposite side to "pull" exhaust gases from the cylinder while the exhaust valves are open. This aids in efficiency, mid-range power, and helps keep your exhaust valves cooler. It can also help to reduce noise somewhat. So yes, it does have a purpose, and it is worth looking at replacing - the only thing is, you have to make sure it's done right. The position in the exhaust and the size of the cross-over are tuned to the exhaust, so that the opposite cylinder bank pulse scavenges exhaust gases. If the cross-over is too far or too close to the exhaust manifold, or is too small or too large, it could end up doing the exact opposite - creating back pressure when the cylinder is supposed to be evacuating exhaust gases, and burning up your exhaust valves.

Bob Kennedy
Posts: 4
Joined: Thu Feb 04, 2010 2:19 pm
Location: Vancouver, WA
Motorcycle: 1984 GL1200 Aspencade

Re: Cross over exhaust

Postby Bob Kennedy » Fri Mar 19, 2010 11:15 am

It sounds like something I should keep.
Thank you for the reply.


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