Modified Exhaust on 2016 Kodiak 700 - Yamaha Kodiak 700 Forum
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post #1 of 8 Old 01-11-2016, 07:30 AM Thread Starter
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Thumbs up Modified Exhaust on 2016 Kodiak 700

Well I had ordered the R2 tip for my exhaust and I was not impressed. After installing I took it for a ride and I noticed that it seemed to have a bit more power, but on the down side it has alot of popping and back firing on decel. I then spoke with a guy that was on a Grizzly and he and I got to talking and he showed me how he had modified his exhaust. It was an earlier Grizzly (unsure of the year) as it only had 3 bolts on the exhaust tip that he had made. He stated that he did not have any issues with it and doesn't run a fuel tuner. So I took the idea and ran with it. I removed my exhaust tip and measured the outside diameter which was about 4 inches. So with that I cut out a 4 inch circle out of a 1/8 inch piece of metal with a hole saw, then I started out by drilling the center out to 7/8inch which is the stock exhaust and then drilled the 4 mounting bolt holes 1/4 inch, then welded on a 4 inch long 7/8inch pipe with a slight down ward slope. Ran better then the stock exhaust, and no popping or back firing. So with that I set out to find out how big of a pipe I could run without getting any I'll effects (i.e popping or back firing). I went through 1 inch, 1 1/8 inch, 1 1/4 inch, 1 1/2 inch all with no ill effects, but did notice better acceleration with each size up. Then I went to 1 3/4 inch and started to notice a bit of popping on deceleration. So with that I stayed with 1 1/2 inch exhaust pipe approximately 4 inches long with downward slope, but not just a 90 degree like stock. I also cut a piece of screening material as a spark arrestor and tested the exhaust with it in and out (screen material) and I didn't notice a difference. I know that some places require the screen (spark arrestor) or you won't be able to ride without it. Below are some pics of the exhaust as I designed it. Oh and it sounds great, not to quiet and not to loud, but just the right amount of power and sound. I will have it either powder coated or ceramic coated depending on how it starts to look. Total cost for mod, $15.00 (flat metal 4x8 inch and one 90 degree electric conduit pipe, both from Lowes)
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aka, Mudslut
2016 Kodiak 700 w/ Snorkel Kit, Front & Rear Luggage Boxes, Auxbeam 12 inch Led Light Bar, Auxbeam 6 inch Reverse Light, 3500 pound BadLands with Synthetic line and hawse fairlead, Sheave milled 3mm, replaced stock head lights with Led Light


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post #2 of 8 Old 01-12-2016, 11:58 AM
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Great MacGyver job! Is the second picture the un-modded R2 tip mounted onto your Kodiak?
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post #3 of 8 Old 01-12-2016, 05:17 PM Thread Starter
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No the second pic is the stock exhaust (spark arrestor tip). I forgot to add the finished tip pic. As you can see the the exhaust tip is clearly bigger from the first photos to the finished one.
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dashaint and Primethious like this.

aka, Mudslut
2016 Kodiak 700 w/ Snorkel Kit, Front & Rear Luggage Boxes, Auxbeam 12 inch Led Light Bar, Auxbeam 6 inch Reverse Light, 3500 pound BadLands with Synthetic line and hawse fairlead, Sheave milled 3mm, replaced stock head lights with Led Light


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Last edited by robval1987; 01-12-2016 at 05:27 PM.
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post #4 of 8 Old 01-15-2016, 05:42 PM Thread Starter
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Thumbs up

Definitely gained some hp, you can just fell the pull. I don't have any decel popping or back firing, I bet once I add a fuel controller this will be a wicked ride especially with all the clutch mods I'm about to put on.
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aka, Mudslut
2016 Kodiak 700 w/ Snorkel Kit, Front & Rear Luggage Boxes, Auxbeam 12 inch Led Light Bar, Auxbeam 6 inch Reverse Light, 3500 pound BadLands with Synthetic line and hawse fairlead, Sheave milled 3mm, replaced stock head lights with Led Light


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post #5 of 8 Old 07-16-2018, 11:23 AM
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Robval you wouldn't be interested in making one of these for me would you? I don't have access to welding equipment :/
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post #6 of 8 Old 09-22-2019, 12:22 PM
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Hey, thanks so much for this info. Really appreciate you taking the time to help us out so we dont all have to go thru the trial and error. Cheers!
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post #7 of 8 Old 09-22-2019, 02:37 PM
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Great info! Thanks for this bad arse post

Popping and backfire on deceleration do seem a bit much.

<:: 2018 Kodiak 700 ::>
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post #8 of 8 Old 09-25-2019, 12:25 PM
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Pics of my homemade 1.5" SS tip, holes need to rotate 45degrees so exhaust doesn't blow straight at the rack support.
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