With our recent redevelopment and release of our new Dual Exhaust System for the 2014-2015 Grizzly 700, we have discontinued manufacturing the original Barker's Single Exhaust for the 2014-2015 Grizzly 700. Here's why.
When Yamaha released the 2014 Grizzly 700 with a single exhaust port, we got to work on a single exhaust. At the time this seemed like a natural fit, so we developed, tested, and felt satisfied enough to launch the 2014/2015 Grizzly single exhaust system.
Then when the 2016 Grizzly came out and it struggled on the Dyno a bit, we thought back to the incredible success we had with the 2015+ Raptor 700. This dual exhaust system, which splits into two cans from the single port head, quickly became one of our leading exhaust systems for horsepower gains and overall performance. When we attempted the same style design with the 2016 Grizzly, we were blown away by the gains! At this point we began thinking about the single for the 2014/2015 Grizzly, thinking that maybe we left some ponies on the table with the previous design. We got back to work on the 2014-2015 Grizzly, and sure enough, a powerful dual exhaust for this machine was born.
In our research, we found that these 14/15 Grizzly's run extremely hot from the factory floor. With our single exhaust on this machine, we just did not see the packing life or performance we wanted. After doing some rigorous testing, we found that the AIS system on the Yamaha creates a ton of excess heat. The AIS system adds additional oxygen to the exhaust, causing the exhaust temps on the Grizzly's to get extremely hot. This resulted in the muffler depleting it's packing much quicker than we'd like. In addition to the AIS system, we found that the CVT transmission made the machine run at a higher standard RPM than a geared quad, so the machine coming from the factory already ran lean. Because our duals spread the heat and exhaust flow out and into two separate mufflers, dropping the heat and pressure basically in half, we knew this design would greatly benefit the 14/15 Grizzly.
With our dual exhaust system for the 14/15 Grizzly 700, we also supply 2 pieces of DEI's extreme heat barrier to protect two areas that could be prone to melting plastics. You might also consider greater heat protection to enhance long-term heat protection. For this machine, We highly recommend DEI's Bodywork Protection Kit. To further combat any exhaust heat under your plastics, wrapping the area where the pipes split from 1 to 2 with Exhaust Heat Wrap can further help. We do not recommend wrapping an entire exhaust in heat wrap, though, as this can cause all of the heat to go into the mufflers.
We also do not recommend running this system without properly tuning your machine or adding a fuel controller that is pre-mapped with the ideal settings for this exhaust system upgrade. Blocking off your AIS system can further help to keep the heat down and will prolong the life of your packing.
Check out the Barker's Dual Exhaust System for the 2014-15 Grizzly 700, here.