Aftermarket Exhaust Question

[Benjammer]

Hey Guys, hoping you can clear up some confusion I have reference to an aftermarket slip on exhaust. I have a 2010 FJR (stock) and I'm considering putting on an aftermarket exhaust such as the dual slip on exhaust by Two Brothers.

https://www.twobros.com/cgi-bin/shopper?search=action&sku=005-15604&searchstart=0&template=Templates/TBRSearchResult-Simple-Yam-FJR1300-SO_06.html

Do you have to install a Power Commander if just installing a slip on exhaust???

Appreciate your feedback.

 

[escapefjrtist]

Nothing necessary with slip-ons.

--G

 

[Benjammer]

Nothing necessary with slip-ons.
--G

Appreciate it. That's Great news. Some people say you need a Power Commander or you may have exhaust popping when letting off the gas.

 

[BlackStar]

The decell popping is due mostly to the PAIR system (air injection). You can block that off if it bothers you.

 

[Richouse]

I put on a set of Two Bros. Titanium black series on my '10. I did do the barbarian jumper mod and bumped the fuel up a little but didn't add a power commander. It has been running fine now for over 11000 miles. I did take the PAIR system off. I have no popping on deceleration.

 

[Benjammer]

I put on a set of Two Bros. Titanium black series on my '10. I did do the barbarian jumper mod and bumped the fuel up a little but didn't add a power commander. It has been running fine now for over 11000 miles. I did take the PAIR system off. I have no popping on deceleration.

Pilot Thanks for the info. "If" I go with the slip ons I'll probably leave the Pair system in place. Hopefully won't have issues. Hard to believe that just by replacing the stock exhaust could cause that big of a difference.

 

[Bounce]

The bottle neck is the cat/con. In pre-2013 that's in the collector under the frame at about where the rider's pegs are. In the 2013 they may be in the cans themselves. Unless you open up the exhaust section with a complete header-back system, there's no need for a remap just for slip ons.

I have popping on both my FJR and my Subaru STi as a result of exhaust mods (slip-ons only on the FJR). It's the air injection and how after market cans do less to mask the cumbustion of extra fuel when dumped as the throttle is chopped. With the STi, I need to be heavy into the boost and chop the throttle for it to happen (Stage 2 with complete intake and exhaust mods, custom tune, etc.). Wicked when it happens though.

 

[wfooshee]

The popping is there whether you have stock cans or not. It's an emissions system to consume unburned hydrocarbons that get out of the cylinder with the exhaust gas, and is a bigger problem with cold engines since they run so rich when cold. The system allows air into the exhaust stream to provide oxygen, allowing the excess hydrocarbons to burn in the exhaust pipe instead of coming out into our fresh breathable air. An aftermarket exhaust system makes the popping "worse" simply because you can hear it better in a less restrictive muffler system.

The exhaust doesn't cause popping, it makes it more audible. The popping is not an indication of something wrong with the engine.

 

[garyahouse]

The popping is there whether you have stock cans or not. It's an emissions system to consume unburned hydrocarbons that get out of the cylinder with the exhaust gas, and is a bigger problem with cold engines since they run so rich when cold. The system allows air into the exhaust stream to provide oxygen, allowing the excess hydrocarbons to burn in the exhaust pipe instead of coming out into our fresh breathable air. An aftermarket exhaust system makes the popping "worse" simply because you can hear it better in a less restrictive muffler system.
The exhaust doesn't cause popping, it makes it more audible. The popping is not an indication of something wrong with the engine.

+1: great explanation. When I put SkooterG's old Staintunes on my 05, I noticed the popping right away, especially with the baffles out. Crank up the R's, chop the throttle shut, and it sounds like popcorn... for the first mile or so. Afterwards, when the bike warms up, I rarely hear anything. It's totally a NON-ISSUE. I left the pair system alone as I'd like to do my part keep those unburned hydrocarbon levels down. Don't shoot me here, but I'd like to keep America beautiful. Guess I was raised to respect something that it seems nobody has ever mentioned before on this forum. It's one of the reasons that I don't mind hearing the popping when I first start up the bike. It's a reminder to me that I'm doing something to make a difference. Call me crazy, fine, but I feel good about that. Besides, I actually like pop corn.

Gary

darksider #44