Catching up on some modifications to the 2013 Suzuki SFV650. I had these parts on hand for more than a month before I was able to complete the installation and then it was the middle of August and blazing hot and humid. I had wanted to document more, but the sweat was dripping off even with this simple work.
Like many motorcycles today, the stock exhaust on the SFV650 is large, ugly, heavy, and extremely quiet (bicycle riders rarely notice me coming up behind them).
The picture below is the OEM slip-on exhaust. Not sure how much of the volume of this exhaust is actually in use, but even the lower hole for the exhaust outlet is fake. What is the point of that?
I have been wanting to change this for a while, but was always concerned with the MA annual inspection that any changes would give me trouble passing the inspection. I then found the Yoshimura TRC slip-on exhaust which is considered a replacement part and maintains the street legal aspect of the exhaust system. Here is what you find when you dig through the box of packing peanuts:
Installation instructions, a bag with the heat shield, clamps, and springs, a low volume insert, the strap clamp, and the exhaust canister.
Removal of the old exhaust is straight forward. Remove the heat shields and the single bolt connecting the exhaust to the rearset, and slip it off.
The OEM exhaust was held on by the one bolt to the rearset. The Yoshimura TRC will use this same bolt with a new strap, but will also be pinned and clamped at the catalytic converter connection. This requires slipping on the new exhaust, verifying that everything is aligned properly, drilling a 13/64″ hole into the existing catalytic converter, placing a pin in this hole to lock the exhaust to the catalytic converter, and then tightening a clamp over the pin. The next three photos show these steps.
Finish it off by installing the chrome heat shield and that is it.
End result, it is not much louder than the OEM exhaust, but has a bit of a deeper rumble to it. The OEM exhaust was stamped to comply with a 80 dB sound limit. The new exhaust, as measured with an app on my phone, was 80 dB at idle. Since the sound volume was still only 80 dB, I did not install the low volume insert to see what impact it would have. It is a tight fit to install and then requires punching a hole in the end of the exhaust canister for a set screw. If I was going to install, I would probably take some Emory paper to the insert first to make it easier to insert and remove if necessary.
Without doing a full exhaust system replacement, including the removal of the catalytic converter, there will not be much change in the overall performance or sound. The catalytic converter is the controlling factor of the exhaust system and that can not be removed in MA and still pass the annual inspection.
Overall, this upgrade meets my needs. Slightly better sound and much better looking.