Finding the right xs650 exhaust system is usually the first big decision people make whenever they start tearing into a Yamaha twin. It's one of those parts that completely changes the identification of the bicycle. You may make a bone-stock 1970s commuter plus, simply by swapping the particular pipes, turn it into a snarling street tracker, a low-slung bobber, or even a refined cafe racing. But it isn't almost the appearance; the way in which these parallel twins breathe has everything to do with how they perform and, even more importantly, the way they appear.
If you've spent at any time around an XS650, a person know that "thump. " It's obtained a 360-degree crank, which gives it that classic English twin rhythm, even though it's a Japanese machine. Obtaining the exhaust right means amplifying that will character without producing the bike unrideable or annoying the particular neighbors too very much. Let's break straight down what you actually need to know just before you start bolting things on.
Finding your design: 2-into-2 vs. 2-into-1
The very first fork in the street is deciding between a 2-into-2 or even a 2-into-1 setup. There isn't a real "wrong" answer here, but they do completely different things with regard to the bike's personality.
A 2-into-2 system is usually the classic option. It keeps the symmetry of the particular bike intact, along with a pipe working down each aspect. This is exactly what you'll see upon most vintage restorations and "brat style" builds. If you would like that will traditional look exactly where each cylinder has its own voice, this is the way to proceed. It's also generally simpler to tune since you aren't dealing with the scavenging complexities of a collector.
Upon the other hands, a 2-into-1 xs650 exhaust system is frequently the choice for the performance-minded crowd. By blending the two plumbing as one, you obtain a scavenging impact that can assist pull exhaust fumes out of the cylinders more effectively. It usually effects in a slightly "racier" sound— a bit more urgent and less "plonky" than the particular dual pipes. Plus, it tucks almost everything away on 1 side, which could give the bike a much leaner, more aggressive profile.
Requirements and the bear
Let's become real: most of us change the exhaust because we want the bike to seem like the beast. The stock Yamaha mufflers were fine for period, but they're heavy, quiet, and truthfully, a bit unpleasant by modern custom standards.
When you begin looking at a brand new xs650 exhaust system , you have to think about exhaust baffles. Running straight pipes might seem such as a cool, edgy idea, however your hearing (and your engine's valves) will probably repent it. An XS650 with zero backpressure is a problem to jet properly. It'll pop, backfire, and probably have a massive flat spot in the mid-range.
Most people look for a joyful medium with "commando" style mufflers or shorty megaphones. These people offer enough limit to keep the engine happy whilst letting that deep, rhythmic pulse shine through. If you want it loud, look for something with removable fiber-glass packing. That method, you can tune the "bark" want without losing all of your low-end torque.
Materials and coatings
What your pipes are made of matters more than you might think, especially for long-term maintenance. You'll generally find three main options: chrome-plated metal, stainless steel, plus raw steel (often meant for heat wrap).
Chrome could be the traditional option. It looks incredible when it's thoroughly clean, but cheap chrome will blue or even yellow almost instantly near the header ports. If you're heading for a show-bike finish, you've got to spend the cash on high-quality plating.
Metal steel is the yellow metal standard for many custom builders these types of days. It's durable, it handles warmth well, and it evolves a beautiful golden straw color with time. It's a little bit more expensive upward front, but you'll never have to worry about it rusting out from the inside.
Then there's the high temperature wrap route. Usually, men will take some raw or somewhat rusty pipes, cover them in fiber-glass tape, and call it a day. It gives the bike a rugged, industrial look. Just be careful—heat wrap can trap moisture contrary to the metallic if the bicycle sits, which can easily result in the plumbing rotting out quicker than you'd expect.
Performance plus the jetting headache
Here is the component where people generally get stuck. A person can't just throw a high-flow xs650 exhaust system on the bike and expect this to run perfectly. If you increase the airflow out, a person have to increase the fuel heading in.
If you move in the restrictive share boxes to wide-open pipes, your bicycle will probably run "lean. " This indicates it's getting too much air but not enough gas. It'll run hot, it'll struggle to idle, and you might still damage the pistons if you press it too difficult.
Anytime you replace the exhaust, plan on investing a Saturday afternoon messing with your carburetors. You'll probably need larger major jets and probably a shim on the needle. It's a bit associated with a "trial and error" process, yet once you find that sweet place, the bike is going to feel like it's gained five hp just by becoming able to breathe.
High water lines vs. Low pipes
The physical routing of the particular pipes changes the particular "vibe" of the particular bike greater than almost any other mod.
Low-slung pipes that operate underneath the footpegs are usually great for that will traditional cruiser or street bike seem. They keep typically the center of the law of gravity low and keep the heat far from your legs. This is actually the "safe" and vintage bet for many builds.
High-mount pipes , often seen on scramblers or trackers, are a whole various ball game. They will look incredible and give the bike a lot of ground clearance, which usually is great if you're actually having your XS650 into the dirt. However, they come with a capture: heat. You'll require some serious warm shielding unless you want to melt your trousers or even burn your inner thigh every period you stop from a red gentle.
DO-IT-YOURSELF vs. Off-the-shelf
Nowadays, we're fortunate because there are usually several companies making high-quality, bolt-on kits. A person can buy a complete xs650 exhaust system that's specifically designed for the body, meaning you don't have to weld the single thing. They are great because they usually come along with the correct mounting brackets and hardware.
But in the event that you're a "built, not bought" type of person, the particular XS650 is an extremely forgiving platform for the DO-IT-YOURSELF exhaust. You can purchase header flanges and U-bends and patch together some thing totally unique. Simply remember that the particular length of the particular pipes affects the tuning. Very short pipes (the types that end right under the engine) look mean, but they are infamously difficult to obtain running smoothly over the whole RPM variety.
Don't forget the gaskets
It sounds like a little detail, but whenever you're installing your own new system, please make use of new copper smash gaskets . I've seen so numerous people reuse their particular old, flattened gaskets only to wonder why the bike sounds like the chirping bird and won't idle. The tiny air drip at the mind can ruin the performance of your most expensive exhaust system. They're cheap—buy a small number of them and keep them in your toolbox.
Final thoughts
All in all, picking an xs650 exhaust system comes lower to what makes you need to get out and ride. Perform you want a bike that screams at high RPMs and looks like it belongs on a flat-track routine? Or do a person want a calm, deep-toned cruiser that will you can ride for 3 hours with no your ears ringing?
The XS650 is such a versatile platform that it can handle nearly anything you toss at it. Remember the exhaust is just one half of the equation; make sure you're offering the carbs several love too, plus you'll have the bike that sounds as good as it looks. There's nothing quite like the sensation of kicking that double over and listening to it bark to life through a new group of pipes. It's the soul of the machine, so take your time and pick the particular one that matches your vision.