The CB1100 Community Forum

mgoodie, what is the inside diameter of your Emgo slip on muffler? Mine is ~1-3/4", on the inside of the collar connecting neck, but my connecting pipe is much larger, so there is no way for the muffler to be slipped on and clamped at that point. Any one (or combination) of the supplied Emgo "reducers" only make it worse.

Basically, this fitment issue with the Emgo's muffler (i.e. a "universal" 17" long short reverse cone so-called "slip on") is the result of it being designed for smaller displacement engines. The intended use is to slip on to an exhaust pipe (before connecting to the stock muffler) that is smaller in diameter. The OD of that opening must be in the range of 1-3/8 to 1-3/4". However, a 4 into 1 exhaust system, like on the 1140cc engine of the CB1100, is designed with a larger diameter. Also, there is the issue of the Emgo (by design) of not providing a landing bracket for a center stand stopper, because it has no link pipe already provisioned for that requirement.

Bottom line, the Emgo is relatively cheap and we got what we paid for, unfortunately a slip on muffler that is basically incompatible with a CB1100. But with some ingenuity and perseverance, it can still be made to work. There are at least three cases of this being true, including yours, as documented on this forum including YouTube. Those seems to have overcome all obstacles (with or without the outside help of a muffler shop or some sort of interconnecting adapter, resulting in satisfactory installations.

Thanks for sharing.

(07-11-2016, 04:09 AM)dsinned_imp Wrote: [ -> ]mgoodie, what is the inside diameter of your Emgo slip on muffler? Mine is ~1-3/4", on the inside of the collar connecting neck, but my connecting pipe is much larger, so there is no way for the muffler to be slipped on and clamped at that point. Any one (or combination) of the supplied Emgo "reducers" only make it worse.

Basically, this fitment issue with the Emgo's muffler (i.e. a "universal" 17" long short reverse cone so-called "slip on") is the result of it being designed for smaller displacement engines. The intended use is to slip on to an exhaust pipe (before connecting to the stock muffler) that is smaller in diameter. The OD of that opening must be in the range of 1-3/8 to 1-3/4". However, a 4 into 1 exhaust system, like on the 1140cc engine of the CB1100, is designed with a larger diameter. Also, there is the issue of the Emgo (by design) of not providing a landing bracket for a center stand stopper, because it has no link pipe already provisioned for that requirement.

Bottom line, the Emgo is relatively cheap and we got what we paid for, unfortunately a slip on muffler that is basically incompatible with a CB1100. But with some ingenuity and perseverance, it can still be made to work. There are at least three cases of this being true, including yours, as documented on this forum including YouTube. Those seems to have overcome all obstacles (with or without the outside help of a muffler shop or some sort of interconnecting adapter, resulting in satisfactory installations.

Thanks for sharing.

Im sorry I cant measure since I sold the bike a few months ago but Im led to believe that Emgo changed the inside diameter sometime between when I bought mine and you bought yours. Cause I know I just slid mine on and tightend it down I may have used one of the reducers but cant remember.

I did find a question I answered on Amazon of the original product I bought that lists sizes of the reducers, I'm not sure if you can compare to the one you bought to see if we got different mufflers. Here's my answer copied for amazon.

It is 12" long and includes reducer set for 1 3/8, 1 1/2, 1 5/8 or 1 3/4 pipes. Does very little muffling so they are loud, build quality if far superior than price says it should be.

Edit here is link to original listing for mine on amazon, maybe check to see if its a different part #
[url=https://www.amazon.com/gp/product/B008YEKHN4/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1]https://www.amazon.com/gp/product/B008YE...UTF8&psc=1

NP, sorry, I forgot about that.

Btw, I meant to say its 12" long, not 17" and I received the same set of 3 reducers with mine. Note that no reducer is required for a 1-3/4" OD connecting pipe. All the reducers do is sequentially step down by 1/8" IDs, so the Emgo can be connect to smaller diameter pipes.

The thing about connecting "directly" to the header pipe on a CB1100 is the Emgo will then be "splayed" out at an angle from the center line of the bike. This can be done, of course, as you apparently did, but then the exhaust looks kind of peculiar and out of place. That is the advantage of a properly designed link pipe for the CB1100, which also solves the problem of providing a landing bracket for the center stand rubber stopper. A link pipe with a 1-3/4" OD is required to be compatible with Emgo's inlet opening, but does such a link pipe actually exist?

A member here by the name, "gcarper" said, a spare link pipe he had from a older model FZ1 worked well for his installation on his CB1100, but I'm not sure about the center stand landing. I think he had to make a special bracket for his CSS and located it on the left, underside of the bike. He shows that bracket in his You Tube video.