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GEAR GRINDER: GRIZZLY 700 DUAL EXHAUST

October 6, 2016
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Barker’s built one powerful pipe By the staff of Dirt Wheels

Not too long ago we tested Barker’s Yamaha Raptor 700 dual-exhaust system and were very impressed by it. They recently released their new Grizzly dual-exhaust system that they claim will improve power by upwards of 20 percent to the wheels. The 4×4 quads can be just as fun as any sport quad and benefit from more power as well. We got a hold of the $899 Barker’s dual-exhaust system and paired it with a $210 EHS Racing power programmer.

 

You should get quiet-core inserts and spark arrestors for anything but closed-course racing. There are four color options for the system’s exhaust tag.
You should get quiet-core inserts and spark arrestors for anything but closed-course racing. There are four color options for the system’s exhaust tag.

 

THE INSTALL

To start, you will have to remove a significant amount of plastic paneling on the Grizzly to install the exhaust and the EHS power programmer. The install can take an hour or longer, but is more tedious than difficult. The hardest part is removing the stock exhaust springs and getting to the header mounting bolts.

The EHS programmer requires one lead to connect to a solid ground on the Grizzly, which we found under the panel in front of the handlebars. After that you simply have to route the wiring to the fuel-injection system. You disconnect the stock wiring and incorporate the new wiring. The system utilizes the same wire connectors as the Grizzly, so it is literally plug-and-play.

The best way to fit this exhaust system onto the machine is to loosely mount the header pipe, then loosely mount the mufflers. We connected the head pipe and mufflers with the included springs, and then tightened down the head pipe followed by the mufflers.

 

EHS Racing programmed their EFI controller specifically for Barker’s exhaust system. If you installed the exhaust without the controller, your Grizzly would lose power.
EHS Racing programmed their EFI controller specifically for Barker’s exhaust system. If you installed the exhaust without the controller, your Grizzly would lose power.

 

TIME TO TEST

Upon first firing up our 2016 Yamaha Grizzly 700 with the new Barker’s dual-exhaust system, we realized that quiet was the exact opposite of what we got. It would be perfect for mud racing or other types of closed-course competition. Fortunately, Barker’s offers spark arrestors ($15 each) with quiet-core/spark-arrestor combinations for $20 each. It should come with both the quiet cores and the spark arrestors. There is no trail in California (and few other states) where open pipe would be legal.

There is a very apparent power increase with the combination of the EHS Racing EFI programmer and the Barker’s system. Low-end torque felt like it increased dramatically and the machine pulled harder than stock through the whole rpm range. EHS spent a lot of time with Barker’s to set up a specific mapping that gives the Grizzly the most power possible out of their new dual-exhaust system. They claim this combination gives the Grizzly 7–10 additional horsepower, and we would have to agree with that claim. The power increase is very apparent, and if you want this system for yourself, go to www.barkersexhaust.com or call (989) 269-6921.

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