Yoshimura AT2 Stainless Slip-On Exhaust for SV650: Fitment and Installation Guide

Quick answer

The Yoshimura AT2 stainless slip-on is a straightforward bolt-on for the SV650, but a clean result depends on preparation, not force. Support the bike, let the exhaust cool, check that the mid-pipe and muffler you have match your model year, then dry-fit everything before tightening. If you need a connecting pipe or clamp, order the correct Yoshimura replacement part rather than adapting hardware.

A slip-on is one of the simplest changes you can make to an SV650, and the AT2 stainless version is designed to bolt to the stock header without cutting or welding. Most of the work is in the setup: confirming fitment, supporting the bike safely, and tightening joints in the right order so the system sits without stress.

This guide walks through the job from pre-check to first start, including the checkpoints that separate a rattle-free install from one that leaks or loosens within a week. It also covers the small Yoshimura parts that are easy to overlook until you are halfway through the job.

Before you start: confirm SV650 fitment and gather parts

Fitment is the first thing to verify, because exhaust generations and mounting points differ across SV650 model years. Check the product listing for your exact year, then look at your bike: the stock header outlet, the muffler mounting point, and the clamp style. If your bike has an aftermarket header or a modified subframe, confirm the AT2 will still align before you loosen anything.

Lay out the parts and hardware in one place so nothing goes missing mid-job. A slip-on kit typically includes the muffler, a connecting tail pipe or mid-pipe, clamps, and mounting hardware, but small pieces like washers are easy to lose. If you are short a clamp or washer, Yoshimura sells the individual components rather than forcing you to buy a whole system.

• Photograph the stock exhaust routing before removal so you have a reference for the new layout.
• Work on a cool exhaust. Even ten minutes after a ride, a header can still burn you.

Step 1: Support the bike and remove the stock muffler

Put the bike on a rear stand or a stable lift, and make sure it cannot tip while you pull on a stuck clamp. Spray penetrating oil on the stock clamp and mounting bolts, wait a few minutes, then loosen the muffler mount and the clamp at the header joint. Support the stock muffler with one hand as the last bolt comes out so it does not drop onto the swingarm or your foot.

The most common mistake here is prying on the header pipe to free a seized muffler. That can bend a pipe or crack a weld. If the joint will not move, work the clamp loose first and twist the muffler gently rather than levering against the header.

• Keep the stock clamp and bolts in a labeled bag in case you need to refit the original system later.
• Check the header outlet for old gasket material or carbon buildup and clean it before the new pipe goes on.

Step 2: Dry-fit the AT2 mid-pipe and muffler

Slide the connecting pipe onto the header outlet without tightening anything, then hang the muffler on its mount. Dry-fitting first lets you see whether the pipe is fully seated and whether the muffler bracket lines up with the frame. On an SV650, a small rotation of the mid-pipe often changes the muffler angle significantly, so adjust before you commit.

Do not fully tighten the clamp or the mount yet. Leave every joint slightly loose so the system can find its natural position. If the muffler bracket is far from the mounting hole, stop and check that you have the correct part for your model year rather than pulling the system into place.

• A muffler that needs to be forced into alignment will usually crack or rattle later.
• Check clearance to the swingarm, rear tire, and bodywork through the full suspension travel if you can.

Step 3: Tighten in sequence and torque the joints

Once everything lines up, tighten the header joint clamp first, then the muffler mount, then any bracket hardware. This order lets the system settle without loading one joint against another. Use the torque values in your kit instructions where supplied; if a value is not listed, snug the hardware firmly without over-tightening, especially on stainless clamps and small bolts.

The frequent mistake is tightening the muffler mount before the mid-pipe is fully seated. That locks in a misalignment and can create a leak at the header joint. Recheck that the connecting pipe is pushed fully onto the header before final torque.

• Stainless hardware can gall; a small amount of anti-seize on threads helps if you plan to remove it later.
• Do not use impact tools on small exhaust hardware.

Step 4: Check for leaks and recheck after the first ride

Start the bike and let it idle while you listen at the header joint and mid-pipe connection. A light puffing or ticking that fades as the metal warms is normal; a steady hiss or visible soot streak means the joint is not sealed. Let the exhaust cool completely, then re-tighten the clamp and recheck.

After the first ride, go over every bolt again. Heat cycles cause exhaust hardware to settle, and a clamp that felt tight when cold can loosen slightly. This five-minute recheck is the difference between a system that stays quiet and one that develops a rattle.

• Look for a dark soot line around the joint as an easy leak indicator.
• If the muffler body contacts the swingarm or bodywork, adjust the mid-pipe rotation rather than adding washers.

When to replace rather than reuse hardware

Clamps, washers, and small fasteners are inexpensive, and reusing stretched or corroded hardware is a common cause of exhaust rattles. If a clamp has lost its shape or a bolt threads poorly, replace it. Yoshimura stocks the small components for its systems, so you can order the exact clamp or washer instead of hunting through a hardware bin.

If your muffler itself is damaged from a tip-over, repair is sometimes possible, but a replacement muffler is often the more practical route. Check the condition of the can before you spend time installing around a dented or holed body.

• Order the correct clamp for your system rather than a generic hose clamp.
• If you are unsure which replacement part fits, call Yoshimura at 800-634-9166 or email [email protected] with your bike details.

Installation checklist: step, mistake to avoid, checkpoint

1. Confirm fitment for your SV650 year: Match the AT2 slip-on to your exact model year and check the header outlet and mount style before loosening anything. Checkpoint: if the part number does not match your year, stop and confirm with Yoshimura before starting.
2. Support the bike and remove the stock muffler: Use a rear stand, penetrating oil on the clamp, and support the stock muffler as the last bolt comes out. Mistake to avoid: prying on the header pipe to free a stuck muffler.
3. Dry-fit the mid-pipe and muffler: Slide the connecting pipe on, hang the muffler, and rotate the mid-pipe until the bracket lines up naturally. Checkpoint: the muffler should sit without force before you tighten anything.
4. Tighten in sequence: Torque the header joint clamp first, then the muffler mount, then bracket hardware. Mistake to avoid: tightening the mount before the mid-pipe is fully seated.
5. Check for leaks and recheck after the first ride: Idle the bike, listen at the joints, let it cool, then re-torque every bolt after one heat cycle. Checkpoint: a soot line at the joint means the clamp needs another pass.

Parts that matter for this install

• R77mini Muffler Clamp, Stainless: Muffler clamps are needed to tighten the connecting points on your system. A correct clamp holds the joint without crushing the pipe, which prevents leaks and rattles after heat cycles.
• 8MM FLAT STAINLESS WASHER: Yoshimura sells all its small components, including rivets, rivet bands, nuts and bolts, and grommets. Replacing a missing or corroded washer is cheap insurance against a loose mount, and you can order the exact size instead of improvising.
• CBR500R 16-20 STAINLESS SLIP ON TAIL PIPE, WORKS FINISH: The tail pipe, sometimes referred to as a mid-pipe, is the connecting component to your muffler. Understanding that the mid-pipe is a separate, model-specific part helps you confirm you have the right connecting pipe before install day.

A Yoshimura AT2 stainless slip-on on an SV650 is a manageable garage job when you dry-fit first and tighten in the right order. Keep the small hardware genuine, recheck after the first ride, and the system will stay tight, quiet, and aligned.