Performance exhaust without the excessive noise?

FlyingBasset · 10-19-2021, 02:55 PM

Hey All,

I'm looking to add one of the aftermarket exhausts to drop some weight and improve the performance of my Raven / BSR 250 as I'm learning to ride and don't want the locals to hate me. I don't have the tools to decat and re-weld the stock exhaust, so I'm looking to pick up one of these cheap options and have some money left for a silencer:

Option 1

Option 2

These seem to be a copy of the JFG Racing exhaust that AresRoc put on his Raven in his build thread which fit perfectly with no mod.

So questions are:
1. Any concerns with this plan?

2. anyone have a link to a silencer that would fit this exhaust? I've heard some people say the one in the stock exhaust can be re-used...

Badluck · 10-19-2021, 03:21 PM

I used the Amazon Special Stoneman. It's similar to the eBay one you linked to.

I was able to take the db killer/spark arrestor from the oe muffler and cut the diameter of the disc down to fit inside the Stoneman muffler and that quieted it down a good bit. The negative of doing so is the plastic cone at the rear melted.

You'll also have to bend the pipes a bit and drill out the flange hole. Not going to lie, it was a pain and I'm still not quite happy with my work.

tknj99 · 10-19-2021, 04:42 PM

Probably best route to take would be to cut the cat out and re-weld and stick with the stock muffler.. should net you the power gains without the excess noise

**JerryHawk250** · 10-19-2021, 05:00 PM

If you want to keep it quiet and not have to worry about welding you can just cut the cat completely off and replace that section of pipe and clamp it. I'm sure you could find a slightly larger pipe that would slip over the existing exhaust pipe at the auto parts or a muffler shop.

FlyingBasset · 10-19-2021, 05:38 PM

Thanks for the responses so far everyone, really helpful.

While we're at it, how much worse is the exhaust going to smell if I go to an ebay exhaust / remove the cat?

I don't think the NoX from a 230CC engine is going to be the end of the world, but I do keep the bike in a townhouse backyard and have an HOA - so not pissing off neighbors is in my best interest.

It's a shame the stock cat is SO restrictive and not more like the higher flow options (which are obviously less effective but better than nothing).

Badluck · 10-19-2021, 07:19 PM

With the stock carb and my exhaust I didn't notice the smell being any better or worse than before. After installing a new carb and tuning it, I'd say it's about the same. Either way, no worse than a 4 stroke lawn mower and better than a 2 stroke weed whacker.

2LZ · 10-19-2021, 07:21 PM

If I had to do it all over again on our TT250, I'd cut the cat out of the stock exhaust and leave it at that. The Ebay exhaust, which also looks like the Stonemen and others listed, was just far too loud after a while to my old ears. Annoying.

herbie · 10-19-2021, 07:46 PM

Agree with 2lz

DualSportDude · 10-19-2021, 08:34 PM

I made a baffle out of a piece of aluminum pipe off of a piece of furniture, also wrapped the exhaust tip with as much header wrap as I could fit under the plastic. Turned the tip into a silencer. It works good, still sounds throaty and deeper, it’s still a bit loud but way better.

10-19-2021, 02:55 PM	#1
FlyingBasset Join Date: Jun 2021 Posts: 26	Performance exhaust without the excessive noise? Hey All, I'm looking to add one of the aftermarket exhausts to drop some weight and improve the performance of my Raven / BSR 250 as I'm learning to ride and don't want the locals to hate me. I don't have the tools to decat and re-weld the stock exhaust, so I'm looking to pick up one of these cheap options and have some money left for a silencer: Option 1 Option 2 These seem to be a copy of the JFG Racing exhaust that AresRoc put on his Raven in his build thread which fit perfectly with no mod. So questions are: 1. Any concerns with this plan? 2. anyone have a link to a silencer that would fit this exhaust? I've heard some people say the one in the stock exhaust can be re-used...
	0

10-19-2021, 04:42 PM	#3
tknj99 Join Date: Oct 2020 Location: Central VA Posts: 1,259	Probably best route to take would be to cut the cat out and re-weld and stick with the stock muffler.. should net you the power gains without the excess noise __________________ 2024 Zuma Storm 150 DLX 2019 Beta 430 RRS 2018 VStrom 1000 XT Former China Bikes: Tao DBX1, Brozz 250, CSC RX4, Titan DLX, Templar X
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10-19-2021, 05:00 PM	#4
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,588	If you want to keep it quiet and not have to worry about welding you can just cut the cat completely off and replace that section of pipe and clamp it. I'm sure you could find a slightly larger pipe that would slip over the existing exhaust pipe at the auto parts or a muffler shop. __________________ 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S (Sold) 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel
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10-19-2021, 07:21 PM	#7
2LZ Join Date: Mar 2010 Location: Volcano, Ca Posts: 7,102	If I had to do it all over again on our TT250, I'd cut the cat out of the stock exhaust and leave it at that. The Ebay exhaust, which also looks like the Stonemen and others listed, was just far too loud after a while to my old ears. Annoying. __________________ "Light a fire for a man, and you heat him for a day. Light a man on fire, and you heat him for the rest of his life." 2007 Suzuki DRZ400S (SM convert) 2009 Q Link XP 200 1967 BSA B25 250cc Starfire 2022 Royal Enfield Interceptor 650 2023 Royal Enfield Scram 411 1948 Royal Enfield Model G 350
	1

10-19-2021, 07:46 PM	#8
herbie Join Date: May 2019 Location: Illinois Posts: 864	Agree with 2lz __________________ 2022 Venom KPR 200 Red- the fastest color 16t and 46t sprockets, NGK Iridium CPR8EAIX-9, aftermarket full exhaust system. Top speed 81GPS 2023 Venom SS3 KP mini 150– Nibbi carb, Nibbi air filter, aftermarket muffler, decat 2022 Venom Ghost chopper 250 1997 Honda GL1500 Goldwing 1978 Kawasaki KL250 https://youtube.com/@herbiesgarage681
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10-19-2021, 03:21 PM	#2
Badluck Join Date: Jun 2021 Posts: 80	I used the Amazon Special Stoneman. It's similar to the eBay one you linked to. I was able to take the db killer/spark arrestor from the oe muffler and cut the diameter of the disc down to fit inside the Stoneman muffler and that quieted it down a good bit. The negative of doing so is the plastic cone at the rear melted. You'll also have to bend the pipes a bit and drill out the flange hole. Not going to lie, it was a pain and I'm still not quite happy with my work.
	0

10-19-2021, 05:38 PM	#5
FlyingBasset Join Date: Jun 2021 Posts: 26	Thanks for the responses so far everyone, really helpful. While we're at it, how much worse is the exhaust going to smell if I go to an ebay exhaust / remove the cat? I don't think the NoX from a 230CC engine is going to be the end of the world, but I do keep the bike in a townhouse backyard and have an HOA - so not pissing off neighbors is in my best interest. It's a shame the stock cat is SO restrictive and not more like the higher flow options (which are obviously less effective but better than nothing).
	0

10-19-2021, 07:19 PM	#6
Badluck Join Date: Jun 2021 Posts: 80	With the stock carb and my exhaust I didn't notice the smell being any better or worse than before. After installing a new carb and tuning it, I'd say it's about the same. Either way, no worse than a 4 stroke lawn mower and better than a 2 stroke weed whacker.
	0