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Discussion Starter #1
I started out with the BC drag pipes since I like the look, and it was an inexpensive way to add sound at the beginning. I then took out the air boxes, and it got a bit louder, but not loud enough. So today I put in an x pipe, and now I feel like cars on the 101 will notice me better.

Except, it’s a bit too loud, to the point where my family, neighbors, and police will likely get annoyed. It also doesn’t have as good of a note, and the decel doesn’t sound as good.

Ideally I could try adding some baffle, but the drag pipes have an uncommon diameter. I am also not into the look of the larger pipes.

Has anyone else attempted baffling drag pipes? If I don’t want to spend a ton of money, are my options the predator pro or trident?
 

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When you say loud, is it the popping on decel that bothers you? I found the pops very loud. Since installing the PCV, I’ve not been bothered by them.

I have the stock airbox (modified filters), TEC x-pipe, and Trident slash cuts with baffles wrapped in fiberglass. Can’t say that I find the noise bothersome at all yet it’s loud enough for cars to notice me with a brapppp.
 

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Discussion Starter #3
It’s just too loud at every stage, and not really the popping that’s bothering me. Just the fact that it is now straight pipe.

I’d probably be ok with that level of noise that you have if there was some sort of baffle.
 

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What’s the diameter of the pipe? You should be able to find a baffle or have one fabricated for the pipe.
 

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Discussion Starter #5
The inside diameter is 1.5 inches with outer diameter of 1.625. All of the baffles that I have found are 1 3/8 with outer diameter of 1.5. Or 1.625 with 1.75 outer diameter since it is a standard Harley diameter. Not really much in between.

I’ve decided that I’m not going to spend money on new mufflers now, so my current options are either making this work with baffles, or selling the x pipe I just bought and settling with what I had.

If I put in the 1 3/8 inch in, it would likely still have gaps around the edges.
 

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Discussion Starter #7
I ordered a set of these this morning to see how they work. Is it ok if there is 3 mm of gap around the outside? Do I need to weld up some washers to take up that gap?

The baffles are 35 mm and pipes inside diameter are 38 mm.
 

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It’s only a 1.5mm gap around the baffle. That’s small. Any tighter and I think you might have trouble getting the baffles in the exhaust due to manufacturing variances. You may need to take off the pipe to drill the retaining screw hole underneath the exhaust. I’d also recommend fiberglass packing or maybe steel wool (the right kind) or even both. That should help deaden the noise more and maybe help seal up any leaks.
 

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For what it is worth...
I ride in and around LA all the time...
Mostly Santa monica , the PCH , the 405,101..and once or twice a week..from santa Monica to West Hollywood trough Beverly hills...

I have British custom drag pipes, xpipe and airbox delete...got stopped a couple of time..never got a ticket for being too loud so fare ?

Would not want my bike to be quieter..too dangerous..people's on the fon, Uber drivers..and I do not even tell you about the majijuana smoke clouds when I l am splitting in heavy traffic...
 

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There quite a few of us TBFs in the area. We should gather for a meet. Would be cool to see everyone’s mods IRL.
 

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Discussion Starter #11
I added in those baffles on their loudest setting, and now it’s perfect. It is a bit more tame at idle, and screams when I give it some throttle. It just needed some of the bite taken out of it. The screws are on the bottom and a few inches up, so you can’t even tell.

I might be up for a ride next Saturday. I just need to see what my work schedule is like and how late my Friday might be first. Another friend and I were talking about going to newcombs since apparently the road might be open again. Should we start a new thread for it?
 

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Glad it worked out! Looking forward to seeing/hearing the result.

Maybe we should start a thread to see if any other Bobber owners would be interested in a group meet up in the area. I’m pretty swamped until Nov 9th. I think there’s also a Cars & Coffee on Nov 24th at Williams Mulholland Memorial that we could crash. Might make a good backdrop for the picture thread.
 

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Discussion Starter #14
I’ll take some tomorrow and will attempt to get a video. It may be too loud for the iPhone. Going to run the 12 minute tune and see how much it helps the new setup.
 

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Discussion Starter #15 (Edited)
One picture is if the baffles that I bought, and the other is looking down the drag pipe at them. I drilled a hole about 2 inches from the end of the pipe, on the bottom side, using blue tape so I didn’t scratch around the area I was drilling, And just screwed them in. Total time including removing the pipes to drill was about 30 minutes.

I shot a video as well, but this forum doesn’t allow videos, and I dont feel like throwing it up on YouTube. Like every other exhaust video, it’s much louder than it sounds.
 

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JC3D did you end up with a gap around the end bell, (I can't tell in the picture) or were they a fairly snug fit? And what brand of baffles are those?

I'd love to hear it! if you do get around to posting the vid somewhere.

I always liked the look of the drag pipes the best, but didn't care for the sound. To tinny/brappy sounding for my taste, but baffles might be the ticket.

I have Tridents right now with the baffles chopped in half, and it sounds good, but just looks stock...
 

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Never thought of doing that. How much difference does cutting the baffles in half make?
It definitely increased the volume at idle with out the crackley brappy sound, takes the edge off so to speak, and once you hit about 1800 2000rpm + it sounds just as glorious as when they were full length. :grin2:
 

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Discussion Starter #20
I’ll take a picture of the inside with better lighting, and will try and get a video up even though the iPhone microphone doesn’t pick it up great.

You do still get the mechanical drag pipe sound a bit. It may not have the same deep rumble as the larger cans, but it is just the right amount of volume. It’s mellow at idle. No neighbors complained during my 12 minute tune. While splitting lanes on my commute today, the exhaust went from “pardon me” to “yippee ki yay mother f***er”. Engine braking is also loud and angry, but not a whole lot of excessive popping.

To me, the whole point of a bobber is taking stuff off, so I really wanted to go with the drag pipe, minimalist look.


Here’s a link to the ones I bought from amazon:

MASO 2PCS 35mm Universal Motorcycle Exhaust Silencer Motorbike Muffler Can Insert Baffle Silencer Black https://www.amazon.com/dp/B07QFPHQHB/ref=cm_sw_r_cp_api_i_UjrUDb21S76D5
 
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