There isn't one but you might be able to fabricate an HMF one to work. Assuming the exhaust diameter is the same. All they are are baffled inserts you'd just need to find a way to attach it.

To be honest I think Yoshi pipes aren't that loud. Definitely louder than stock, but for aftermarket they are on the quieter side. Just don't jump on it until your in the woods.

 

Thanks Evilgade
I really like the sounds of the Yoshimura but a little loud for residential use when I plow.


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the yoshi sounds great

 

That's tough when you're plowing, but plowing is noisy anyways. Folks that complain just won't get any help from their neighbor then. You could always toss on the stock exhaust for the winter and put the Yoshi on during riding season.

 

I definitely could but the look and sound is night and day.


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I deal with exhausts and Db killers a bit on motorcycles. I would look at the yosh can and see if there is a hole in the end cone (often bottom) or a snap ring groove just inside the cone. These are the two most common attachment points for a Db killer. If there is a spot for a retainer (screw or snap ring) then yosh probably has a Db killer made, if not you need to make one.

I would not be surprised if it is made for one as most manufacturers need them and they would prefer to make fewer end caps , common parts is better for them.

Heads up on Db killers they usually take off about 5Db which is often enough.
Installing them will richen your fueling a bit.
If the can volume is low and the core is big installing a Db killer may reduce power where if the can is large and the Db is smaller it has less effect on power. Ie: usually a large can with Db killer effects power less than a small can with Db killer.

Any welder or muffler shop should be able to custom make a Db killer, they are pretty simple.

 

Thank you Ducvet
I called Yoshimura and they told me that the exhaust I have already has the quietest core installed. There is a Allen screw holding in the spark arrestor. I may have to look for other manufacturers to see if I can retrofit a DB killer. My other though was if I had made a 90 degree elbow on the end and have it point down to the ground I wonder if that would help with the noise since the sound is bouncing of the ground? Any thoughts?

Thanks Luke

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Thank you Ducvet
I called Yoshimura and they told me that the exhaust I have already has the quietest core installed. There is a Allen screw holding in the spark arrestor. I may have to look for other manufacturers to see if I can retrofit a DB killer. My other though was if I had made a 90 degree elbow on the end and have it point down to the ground I wonder if that would help with the noise since the sound is bouncing of the ground? Any thoughts?

Thanks Luke

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Exhaust pointing down directs sound in just that direction,but how much difference?
You might try to insert some pipe just to hear if it even makes a difference,even plastic, just for a temporarily test.
I redesigned my RJWC DB-killer,works perfect.(restricted/altered flow from original design,very simple welding job)

 

Thank you Synthetic
What did you actually do to make it quieter?

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RJWC quiet core before and after mod.

 

Yoshimura killer might be totally different..?
This RJWC mod make a lot difference,from totally annoying to OK.😉

 

Yes I see both styles of Db killers (open and closed end) if you want you can close a end and then drill your way back to where you want to be. Also differentiate a Db killer and spark arrestor they may mount the same way but do different things.