The CB1100 Community Forum

Check and check.


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Yup, all I did was drill one hole at a time (3/8") until it didn't sound like an exhaust leak. I think 8 or 9 holes, and just put the cap back on, sounds perfect.

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(04-26-2016, 11:24 AM)Carguy1959_imp Wrote: [ -> ]Mine sounds about the same. I drilled 3, 1" holes, removed the snout and opened up the cap.

Exactly how did you do that? It seems that if a person drilled the holes and then reinstalled the end cap, that would negate the sound improvement coming from the holes.

(06-12-2016, 11:32 PM)Catbird_imp Wrote: [ -> ]

(04-26-2016, 11:24 AM)Carguy1959_imp Wrote: [ -> ]Mine sounds about the same. I drilled 3, 1" holes, removed the snout and opened up the cap.

Exactly how did you do that? It seems that if a person drilled the holes and then reinstalled the end cap, that would negate the sound improvement coming from the holes.

Exactly how did you do that? It seems that if a person drilled the holes and then reinstalled the end cap, that would negate the sound improvement coming from the holes. It doesn't, I drilled 6 half inch holes. My bike has a pleasant rumble now with the end cap installed.

Just think what it would sound like if the holes were properly, simetrcally spaced!

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(04-23-2016, 07:05 AM)SStan11_imp Wrote: [ -> ]


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So no other work? No baffle changes?

and, again, is there a MPG cost here or a HP gain? Or is it just tone?

-Peter

(06-15-2016, 12:47 AM)pwh421_imp Wrote: [ -> ]

(04-23-2016, 07:05 AM)SStan11_imp Wrote: [ -> ]


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So no other work? No baffle changes?

and, again, is there a MPG cost here or a HP gain? Or is it just tone?

-Peter

So no other work? No baffle changes?

and, again, is there a MPG cost here or a HP gain? Or is it just tone?

-Peter Nothing else required. If anything my mpg has slightly increased. My seat of the pants dyno tells me no hp gain. The sound is a much deeper rumble than stock, no excessive noise.

(05-10-2016, 03:58 AM)specialist8_imp Wrote: [ -> ]Will be doing this mod in the next few days. I'll also submit a riding video with Spielberg quality production as well.

Add me to the list of looking forward to your riding and/or drive-by video version!

I did this mod drilling holes only and was getting no change in mpg. Commuting is still 48 for mixed city/highway, road trip is 55-60 mpg for all highway. For me it was just to make sure the bike could be heard by pedestrians.

I did this mod, I drilled 8 3/8 holes similar to picture posted.
Sounded pretty good , pulled end cap while running notice improvement so I took a dremel tool and cut the pipe off that protrudes out of the end cap.i cut it about 3/8 " from plate that the holes were drilled in.
This left a bigger hole for exhaust to go thru instead of being squeezed
Between the small pipe and end cap. Really like the sound.