Please select make, model and year4-Stroke Exhaust
It’s no secret that a properly selected aftermarket exhaust system can do wonders for your dirt bike. There isn’t an easier or faster way to add horsepower throughout your bike’s RPM range. When you want a new dirt bike exhaust system, Rocky Mountain ATV/MC is the best source around. We carry an extensive selection of dirt bike exhausts. Do you love FMF exhausts? So do we. Are you looking for a Yosh exhaust system? We’ve got several. How about a ProCircuit T-4 silencer? We carry it. Do you want a Moto Works exhaust? You’re in the right place. Interested in a Lexx MXe slip-on? Get it here at Rocky Mountain ATV/MC. If you own a 4-stroke dirt bike, a new exhaust system is a must have.
Whether you need a new muffler to boost your motocross racing performance or just a good silencer with a USFS-approved spark arrestor for enduro use, Rocky Mountain ATV/MC is the best place to find dirt bike exhaust pipes. We carry all of the leading brands: FMF, Yoshimura, Lexx, Pro Circuit, Motoworks and more. Exhausts are available in a variety of materials as well: titanium, stainless steel, aluminum and even carbon fiber. When you need a 4-stroke exhaust for your motorcycle, you can’t go wrong with these excellent mufflers and silencers. Whether you’re into motocross or just love a good trail, your dirt bike will really rip with these exhaust systems!
Robert in AR
While not a considerable power-adder, my 2006 KLR 650 seems to have benefitted from additional torque during acceleration. The mid pipe uses the factory clamp where it attaches to the header. The silencer is a very tight fit to the mid pipe, and the springs provided were not able to be expanded without failure of the spring. I will use wound wire to ensure they stay connected, however the kit is extremely well engineered and tolerances very tight, so I imagine that I could do nothing, and there is little-to-no chance for separation of the mid pipe from either the silencer or the header. The only other issue is that the bolts that attach the silencer straps to the factory mount locations were too short and did not protrude beyond the back side of the nuts provided. I will likely purchase longer bolts as replacements for this. The entire system looks great on the motorcycle. Sealing the components with high temp silicone works well. Although I like the tunability, there is little chance that I will actually change internals. Although louder than the factory muffler, it is not so much so that it is annoying to the rider; some believe that louder exhausts on motorcycles improves safety in traffic. The only other issue is that there is occasional popping during deceleration. It may be necessary to increase the primary and main jets after installation, but there is no recommendation in the installation instructions to do so. I'm going to ride them a few hundred miles and evaluate the plug before I make any changes to the carb. All-in-all, an excellent product at a super value. I am very happy with it so far.Read All Reviews