Dirt Trax Television Co-Host AJ Lester puts the finishing touches on our project Commander upgrading its shocks and adding slick new rubber and wheels.
Dirt Trax Television Co-Host AJ Lester works on our project Commander upgrading.
Dear Motorhead:
I am interested in an aftermarket dual exhaust system for my 2011 Polaris RZR 800.
Will it do engine damage to my machine if I run the system without using a fuel controller?
The whole machine would be left stock except for this exhaust system and I would probably be using quiet cores as well.
I love your show and never miss an episode, keep up the good work!
Thanks,
Kyle
Kyle:
Thanks for your email!
Your question is impossible to answer with a 100% for sure response, but I can tell you about our experience with the RZR 800 mill and both single and dual exit exhausts.
Thus far we have not used any modified ECU’s with any aftermarket RZR systems – however, that doesn’t mean we shouldn’t have used one!
4-stroke EFI engines are much more tolerant to air flow changes from intake and exhaust mods than 2-stroke engines. Having said that – the benefit of an aftermarket exhaust should be improved performance and its pretty hard to get all a free flowing aftermarket system delivers without changing the fuel map.
Most of the time, the free flowing nature of an aftermarket exhaust simply “fools” the engine’s stock ECU – it doesn’t know anything has changed so the engine becomes leaner by virtue of the new unrestricted exhaust system allowing more air to flow and thus leaning out the air/fuel ratio in the combustion chamber.
If you take the lid off the airbox – if that’s practical given deep water forays can flood the mill without the cover on – you’ll often experience even more performance from the combination of less restriction at the intake and exhaust ends of the mill. FYI – Lean = more power.
So…what does the exhaust maker recommend? If they believe the system needs an ECU change and they’re saying you’ll hurt the engine without it – you better get it when you do the exhaust.
Hope this helps!
Thanks,
Motorhead Mark
Its something we have to ask because over its life-span in the powersports biz, at some point, most people have owned a Honda.
To prove this point, Dirt Trax Television produced an intriguing historical segment earlier this season covering the past 40 years of Honda 4-wheelers, which is now available on the Dirt Trax Television Website in its entirety.
You won’t want to miss this insightful look back at the sport’s number one builder of ATVs hosted by Dirt Trax Magazine Co-Publisher Motorhead Mark Lester and presented by Dirt Trax Television.
Dirt Trax Television Co-Host AJ Lester is nearing completion of his Commander build project. With just a few more elements to go, this ride is shaping up to be a winner.
In this TRAIL TECH segment, Dirt Trax Television Co-Host AJ Lester is in the shop adding some insane aftermarket accessories to our project Commander.
Dirt Trax Television Co-Host AJ Lester installs some sweet aftermarket parts from Blingstar onto our 2011 Can-Am Commander project side-x-side.
In case you hadn’t noticed, the formerly Japanese dominated ATV and side-x-side business is being rapidly set upon by domestic manufacturers.
This paradigm shift in dominance is not hard to understand when reviewing the willingness to invest in innovation the past five model years.
While Japanese OEMs have remained very conservative – some even pulling products back from the market or continuing to sell one, two and three-year-old models.
What seems increasingly clear is this: If you innovate, take calculated risks and listen to your customers, you win.
That fact is neither a domestic nor is it an import idea, its reality.
STI now offers the 12×7 HD2se wheel in a unique 2+5 offset, which addresses several tire and wheel issues for Polaris owners. No other aftermarket wheel is currently available in these dimensions.
For example, Polaris ATV riders have found that it’s difficult to use a front tire wider than 9 inches.
A tire that’s 10 inches wide or more will cause clearance problems and rub the chassis on the inside. The STI HD2se 2+5 wheel allows the use of wider tires, often the desired setup for mud riders.
A set of these wheels also widens the stance of by 6 inches over stock, adding lateral stability without the need for spacers.
Polaris RZR owners will benefit from this wheel as well. Many aftermarket wheels create clearance issues with the right rear engine mount.
Instead of grinding chassis parts or taking other questionable measures, it’s much more convenient to simply bolt on a set of HD2se 2+5 wheels.
Sand dune enthusiasts or anyone else wanting a wider stance will appreciate the extra stability this wheel provides.
The STI 12×7 2+5 HD2se obviously adds another level of style for Polaris ATV and UTV owners alike. This wheel is currently available in a durable gloss black finish with bright machined accents, topped with a tough gloss clear coat.
It will soon be available in STIÂ’s dazzling iChrome finish. A matching HD logo wheel cap is included with every wheel. Like all STI HD Alloy series wheels, the lightweight HD2se features inner and outer heavy-duty wheel lip reinforcement and comes with a lifetime structural warranty; this 12×7 has a 700-pound load rating.
STI 12×7 HD2se 2+5 offset wheels are available at finer ATV/UTV dealers everywhere, through MTA Distributing.
For more information, to place an order or to locate an STI dealer, visit www.stitireandwheel.com or call: East (318) 255-0049; West (951) 272-0971.
Yamaha Motor Corp., U.S.A., the leading maker of ATV and Side-by-Side (SxS) vehicles for outdoor enthusiasts, has donated a 2011 Grizzly 450 in honor of National Hunting and Fishing (NHF) Day’s celebration of outdoor recreation and conservation.
This year’s NHF Day celebration was held on Saturday, September 24, 2011, and proved to be a great success – with more than 100 registered events held in 40 states.
The Yamaha ATV sweepstakes, which remains open through November 30, 2011, was promoted online and at NHF Day events nationwide.
“Yamaha supports preservation efforts across numerous recreational activities and National Hunting and Fishing Day aligns with many of our core values,” said Steve Nessl marketing manager for Yamaha’s ATV and SxS group. “In honor of National Hunting and Fishing Day, Yamaha will make one lucky outdoor enthusiast the owner of a 2011 Grizzly 450, which was designed specifically with hunters and fishermen in mind.”
“We were excited to have Yamaha support the 2011 National Hunting and Fishing Day, marking the company’s third consecutive year as a sponsor,” said Misty Mitchell, Director of Conservation Programs, National Hunting and Fishing Day, Wonders of Wildlife. “The ATV giveaway is a great way to thank hunters and anglers for their contribution to conservation, so donÂ’t miss your chance to register.”
The sweepstakes is open to all outdoor recreational sports enthusiasts. One lucky winner, 18 years-of-age or older, will receive a 2011 Grizzly 450.
Approximate retail value is $6,899. No purchase necessary. The sweepstakes continues to be open until 11:59 p.m. Pacific Standard Time on November 30, 2011. The winner will be determined by random drawing.
Yamaha wants to remind outdoor enthusiasts that they still have time to register to win this ATV at www.yamahaoutdoors.com/nhfday
DIRT TRAX is an international award winning offroad motorsports program with National broadcast coverage on Sportsman Channel in the United States and in Canada on City TV, Wild TV, REV TV, Cowboy Channel, RFD TV and Sportsman Channel Canada, as well as international coverage on our popular YOUTUBE channel.
For all media, sponsorship, and other queries, please visit our Contact Us page.
© TRAX MEDIA INC 2022
