The Truth About Aftermarket Exhausts | MC Garage

An

aftermarket

exhaust is at the top of most Riders' modification list, but what do you really get with that shiny pipe and our stock exhaust, all Just Junk? Anyway, we'll break it down in this MC

garage

video that a lot of people think of. Your bike's original tube was simply cobbled together as an afterthought, 20 or 30 years ago, that might have been the case and if you're riding a budget bike, that's still the scenario, but for the vast majority of Motorcycles, especially sports and high-performance machines, the exhaust is actually designed very carefully, in fact, after the engine, the exhaust system usually absorbs most of the R&D resources, because the pipe is fundamental to the motorcycle's performance, its sound, its appearance and, of course, its compliance with various noise and emissions regulations.

Don't underestimate your stock exhaust because each component has been designed to serve a specific purpose, there's a lot more going on there than meets the eye, the headers are pretty simple, but multi-cylinder bikes often have these crossover pipes that are there to take advantage of the waves. of pressure into neighboring pipes to widen power distribution on some bikes, there's even a valve on the crossover so they're only connected at certain RPMs lower, the header pipes merge and channel into the manifold, this huge contraption Here it does most of the puzzling and houses the catalytic converter; In this case, there are actually three and it provides the volume and routing necessary to attenuate the noise to an acceptable level.

Fuel injected bikes will have one or more of these O2 sensors, which are amazing. It analyzes the exhaust gases and transmits information to the ECU so the computer can make minor fuel adjustments for things like air temperature and altitude. The next important component we come to is this servo controlled valve just before the muffler, opening and closing it regulates the rear end. upstream pressure in the system and by doing so can flatten the torque curve. Sometimes the valve is also used to silence the exhaust to comply with noise regulations, but if you think that's just there to make the sound testers happy, think again about manipulating the back pressure. a big impact on engine performance and in Moto GP similar technology is used to improve mid-range power, finally you have the muffler which will have some gasket around the core to absorb more and more of the sound, although it is the red box underneath of the engine which is responsible for all the silencing and gas cleaning, so this guy is just there for looks, which is why some bikes like the rc390 or the fz09 don't even bother with a traditional muffler like you can.

See the stock exhaust is much more than just some pipes put together and although most manufacturers put a lot of effort into designing a good system it is still a big commitment due to the fact that they have to comply with all those rules and regulations, that's where the

aftermarket

tubes are located. They come in replacement tubes like this Alpha T Beauty from Yoshimira and are designed for closed-course competition. Using only this label here makes all the difference because it means that this exhaust is not street legal and therefore not restricted by the rules that stock

exhausts

must follow.

While a stock pipe has to control a lot of noise and emissions boxes, the only goals of this pipe are to reduce weight, add style, improve sound, and increase power. I'm surprised you listed horsepower last, well it's last on the list because it's not the main draw these days or at least it shouldn't be 20 years ago you could make big profits by hitting a pipe but today Nowadays stock

exhausts

do a very good job of offering ample usable power, there's certainly still room for performance improvement, but if you're going to install a full exhaust system like this, you absolutely have to do it in conjunction with a controller. like a power commander, if you're not adjusting your fuel to match your new system, not only are you leaving power on the table, but you're probably causing your bike to run lean, that means poor throttle response, higher engine temperature and a lot of noise in the diesel, in my opinion the biggest attraction of an aftermarket pipe is the weight savings, a stock exhaust has a lot of things and is also huge. without a catalytic converter, a bulky bread box or back pressure valve and an aftermarket exhaust.

You can shave pounds off your bike, this Alpha T system for the new Yamaha White yfr 6 weighs 11 lbs compared to the stock system which weighs 22 lbs, any weight you want. you can take your bike off, it will make it handle better, plus installing a replacement pipe is much better than going on a diet, there is also a lot more style and attention to detail in the aftermarket, the welds are more precise, there are nice touches , like polished jacketed springs. pipe sections and of course a trick. Fancy muffler finishes like carbon fiber and titanium are rarely available from the factory, but they are quite common on aftermarket systems and some companies really take it to the next level.

Aftermarket pipes are also considerably louder, which some people like. Here is the sound of an R six with original exhaust. Now compare it to the sound of the Alpha T. It sounds sweet at idle and fantastic at full tune on a straightaway, but racing pipes are obnoxiously loud on the street and are also illegal. of all that racing use just decals, but if you want a little more sound and a lot more style, Yoshimira actually offers EPA and carb compliant slip-on mufflers and, in my opinion, for street bikes, a slip-on muffler is definitely the way to go.

They are cheap, cheaper, much easier to install and probably won't require an expensive fuel controller to sum it up. Your stock exhaust deserves respect for juggling a lot of tough jobs and aftermarket pipes are good for saving a lot of weight, improving sound and style and possibly increasing power if you adjust your fuel to match, so there's that all for this video from MC's

garage

. I hope it clears up the debate on the whole stock vs. aftermarket issue and if you like what you saw, be sure to subscribe to the channel. so you can watch this and all our other shows until next time travel carefully