[dtmmil]

with the way the stock exhaust is setup you will get more out of the left side , and if you used short glasspacks they will be louder so you will get even more out the left so makes perfect sense to me

 

[rogotoko]

with the way the stock exhaust is setup you will get more out of the left side , and if you used short glasspacks they will be louder so you will get even more out the left so makes perfect sense to me

Interesting... Hadn't considered that. Has anyone else noticed the imbalance in the exhaust note? I didn't notice any issue with the stock pipes, which incidentally, I put back on until I figure this out. Of course, the stock pipes were so quiet that I probably couldn't have noticed it. But has anyone noticed it with the aftermarket pipes, or mods? The exhaust leak at the weld is miniscule. I took a spray bottle to it while it was running and we're talking like a few tiny bubbles at idle. My OCD was kicking though, every time I would get going from a stop. My uncle was behind me and said it sounded great and balanced though. Scratching my head.

 

[dtmmil]

with your stock pipes on look at which tip is sootier , and feel which one is warmer after a ride

 

[Pelz]

First, right and left side are as if you are sitting on the bike. The right side is the brake pedal side and the left is the shifter side. The right side acts almost like a 2 into 1 with 70% of the flow. Even with that I have thrush mufflers and I don't hear any imbalance. It is probably there but I don't hear it. It sounds like you have a large exhaust leak. Block one muffler with your hand then block the other one. You should hear it.

 

[dtmmil]

First, right and left side are as if you are sitting on the bike. The right side is the brake pedal side and the left is the shifter side. The right side acts almost like a 2 into 1 with 70% of the flow. Even with that I have thrush mufflers and I don't hear any imbalance. It is probably there but I don't hear it. It sounds like you have a large exhaust leak. Block one muffler with your hand then block the other one. You should hear it.

not what im saying , left side will be hotter and sootier , right will be cooler and cleaner

 

[rogotoko]

First, right and left side are as if you are sitting on the bike. The right side is the brake pedal side and the left is the shifter side. The right side acts almost like a 2 into 1 with 70% of the flow. Even with that I have thrush mufflers and I don't hear any imbalance. It is probably there but I don't hear it. It sounds like you have a large exhaust leak. Block one muffler with your hand then block the other one. You should hear it.

So under any conditions, I would expect the right side, if any to producing more sound, and not the left, at only 30% of the flow? I'm gonna do an actual leak test on them tomorrow, since they're off the bike now, and post the results. I actually did block one side and then the other with them on the bike. I couldn't hear any leak. At idle, they sound perfect. At cruising speeds, also perfect. Pass a car, or accelerate up to highway speeds, or just whomp on it a bit and you'll hear the left side more.

 

[rtm1963]

Baffles

Step 5: Place the Glass-pack into the muffler....its a tight fit, and insert as far as it will go. There is NO NEED to cut the muffler open.

Why didn't you just buy some thunder monster baffles for $100 ?
they are easy to put in and the back pressure and sound is great.
i bought some for my last set of pipes and buying some again.

 

[dtmmil]

the thundermonsters will be louder then the thrush mod mufflers

 

[rtm1963]

Big city thunder Baffles

the thundermonsters will be louder then the thrush mod mufflers

I thought the same thing..But they make more then one baffle and the guys I ride with said my bike was more Quiet..My wife rides on the back and she use to want to use ear plugs but after the baffle change she was fine...All you need to do is call them and tell them your needs and they have the baffle for your pipes.Read the testimonials on line.The other thing I like about Big city thunder is they dont feed you a bunch of B.S because the product is that good.They Don't look like much but After you put them I bet you would never pull them out...Ive done a few changes to my bike but this was the best performance change I made and i was just looking to quiet my bike a little...These only take a few min to install.

 

[freebird_78]

Did you ever consider whether the mufflers were installed in opposite directions? A lot of glass packs have a flow direction. You go against that, and it definitely changes the sound.

These are pics of the same glasspack, just from opposite directions.

I installed both of mine to where the inlet goes to the top pic. Sounds even, and more importantly, sounds great.

 

[rogotoko]

I believe Thrush brand glass packs are bidirectional. I could be wrong though. There are no raised louvers inside. I mounted them both with the sticker end at exit. Didn't see any directional stamping, but now you've got me wondering. I'll check them out a little harder when I'm in, in the morning.

 

[dtmmil]

thrush can go either way

 

[SuperDog]

Did you ever consider whether the mufflers were installed in opposite directions? A lot of glass packs have a flow direction. You go against that, and it definitely changes the sound.

These are pics of the same glasspack, just from opposite directions.

I installed both of mine to where the inlet goes to the top pic. Sounds even, and more importantly, sounds great.

Hey freebird, what brand are those glass packs?

Forget it, I am assuming those are the Jones, just went back thru your posts and saw thats what you used.

 

[Jckercheval]

Did you have gutted pipes before? In your opinion is it quieter at riding speeds?

A buddy has a set of Thor pipes on his hammer, I would love to get a sound like that out of my xc.


Sent from Motorcycle.com App

Great idle, great on acceleration. Levels out at cruising speed. Been a couple of months and I am loving the sound and performance. I'm gonna get in trouble. .

 

[rewindguy]

So, what size and length of pipe did you end up with on the outlet end? I gutted a stock set and stuck a set of Kerker 2" full length perforated core wrapped baffles and went with the stock outlet pipe ( 1 3/16"). I put a screen on inlet side and a 5/16 bolt thru the exit for slight back pressure. I get a slight amount of popping but sound was good. Since the snow fell I tried cutting the exit pipe in 1 inch increments and found after the first 1" off the end the sound got way louder exponentially plus the popping got worse each time! I have a tuner that self adjusts so I am believing that the length of the exit pipe is a key feature! On my Supertrapps I had on my Nomad I found the best sound was when I had the Fishtails which extended the exit length by approx. 5" over the other tip options. I am now cutting open another spare set of stock mufflers and have set of Jones inserts but and trying to decide what size of exit pipe to install? I will probably leave the length stock. Any thoughts?

 

[dtmmil]

when i did mine i went with 2.25, the mufflers i am now rebaffling im running 2.5"

 

[rogotoko]

with the way the stock exhaust is setup you will get more out of the left side , and if you used short glasspacks they will be louder so you will get even more out the left so makes perfect sense to me

dtmmil, I think you nailed the issue. There probably is a lot of exhaust diversion to the left side when under load on these bikes. I think that can account for much of this. I tested out the stock exhaust again today. I also checked for any pre-existing exhaust leak at the crossover pipe, etc... All systems check out fine. My bike is a bout 3 weeks old and literally has 700 miles on it at this point, so nothing should be wrong. Anyway, I got myself a hose out and did the stethoscope thing. All good.

On a short little ride, I noticed more sound from the left side again. Now, I will say this, this is my first motorcycle with an exhaust on both sides of the bike. I have ran LOUD pipes on previous bikes, most recently a VTX1800 Neo with V&H Bigshots. They were extremely loud. Prior to that I had a 2 into 1 on a VStar1100 which were painful on a long trip. Both bikes exited on the right side only. Having said that, I might not hear as well on my right side anyway. I might be noticing the left, because I've never heard a left side exhaust on my bikes. IDK. I also did the old vacuum trick on my modified mufflers. No significant exhaust leaks.

Am I the only one that notices an imbalanced exhaust sound? Being a righty and a shooter as well, I can only imagine what damage I've done to this right ear. My only reason for concern, is that these are some pricey bikes, I'd hate to ruin it's longevity with a bargain mod that I didn't evaluate properly. Plus, I love this bike tremendously.

 

[dtmmil]

you wont hurt anything. the crossover diverts the exhaust to the left side, if you were to pull the right side apart and see the crossover, its a cheesy setup, where the left side comes to the right, on the inside there is a small tube that sticks up into the flow of the right side muffler, almost blocking the right side off.

 

[rogotoko]

you wont hurt anything. the crossover diverts the exhaust to the left side, if you were to pull the right side apart and see the crossover, its a cheesy setup, where the left side comes to the right, on the inside there is a small tube that sticks up into the flow of the right side muffler, almost blocking the right side off.

So essentially, I'm gonna notice this with every loud pipe then....

 

[broggyr]

Unless you change the headers, yes.