Bolt-On Cheap Exhaust Option - Page 2

oregon · 08-09-2016, 12:53 PM

do you think this would work on a CSC TT250 ????

2LZ · 08-09-2016, 03:17 PM

Quote:

Originally Posted by oregon

do you think this would work on a CSC TT250 ????

It may if you can get some pipe bent and correct size adapter.
This one rocks though.....and is very inexpensive for what you receive.

http://www.ebay.com/itm/ALUMINUM-EXH...cAAOSwGvhUICrU

david3921 · 08-09-2016, 04:43 PM

Quote:

Originally Posted by david3921

Looks nice. Do you think you'll have to rejet?

Duh. I thought you put it on the TT. Sorry.

2LZ · 08-09-2016, 05:38 PM

Quote:

Originally Posted by david3921

Duh. I thought you put it on the TT. Sorry.

Not a problem. I can see the confusion with how many projects I get going at once. Sometimes I fool myself..... ;-)

2LZ · 08-10-2016, 12:24 AM

Ok...so I was thinking today....there's no reason not to get full tuning ability out of this baffle setup. Like with a Super Trapp, you install and remove plates to adjust backpressure for tuning purposes, this little baffle offers much of the same ability but instead of removable plates, you treat it like a recorder (flute type instrument). It has a movable plug. :-)

So, back to the drill press and I drilled as many more rows as I thought necessary to achieve prime objective, plus, every other hole I drilled a tad larger to help with the fine tuning, minus the first three rows. Anal? Oh yah....but fun all the same.

Theoretically, the more back pressure (more holes you block on the flute), the less top end you'll have, while on occasion gaining mid-range or even a little low end in a carburated model. Hopefully the O2 sensor will play.

I took it out after opening the baffle all the way (plug installed in last location opening as many holes as possible) and man....it really opened up the top end (butt dyno). More frisky and crisp, especially between 6 and redline. Drawback? It got a little noisier but not a ton. Just more shrill. Tomorrow, I'll move the plug up to block off two rows of holes and see what that achieves. It SHOULD lose a little of the top end but it will probably quiet it a bit also. We'll see.

This is fun............ "2LZ at Play".

Weldangrind · 08-10-2016, 11:06 AM

Brilliant! I never thought of moving the plug.

I like your vee block.

2LZ · 08-10-2016, 02:27 PM

Quote:

Originally Posted by Weldangrind

Brilliant! I never thought of moving the plug.

I like your vee block.

Thanks! With the injection, who knows if adjusting the backpressure will work as well as on a carb bike but it's worth a try. I figure the less backed up exhaust gasses (faster scavenging) will lean the O2 sensor to force it to demand more fuel....and visa versa. So far, having all the holes unplugged (full open) has made a noticeable top end difference.

The vee block....Mrs. 2LZ dad cut that out of hardwood for me. It's been a finger saver, for sure. It's my only block of wood I treat as well as a tool. ;-) Oil it twice a year!

Weldangrind · 08-11-2016, 12:47 AM

I might need to make a block like that. I have two that are made from steel, but I can see uses for wood.

It would be interesting to find out the tolerance of the stock O2 sensor. The next step is a wide band.

2LZ · 08-11-2016, 10:05 AM

Quote:

Originally Posted by Weldangrind

I might need to make a block like that. I have two that are made from steel, but I can see uses for wood.

It would be interesting to find out the tolerance of the stock O2 sensor. The next step is a wide band.

I think my next step will be to extend the baffle deeper into the muffler. Lots of room in there. If I can get a tube that will just slip over the end of the stock baffle and extend it another couple/3 inches, that will give it freer breathing, plus more obstacles for the sound waves to hit. I can then move the plug to the end. I've been plotting on a pointy or bullet shaped plug to help move the exhaust charge around the baffle better and not hit such a brick wall. Just depends on what I can find in my stash....

This stupid baffle has become just too much fun. ;-)

Weldangrind · 08-11-2016, 12:29 PM

I'm with you on the bullet shape. My old Gio quad had that in the stock muffler, which I cannibalized for my XL250S project a few years ago. In that case, I measured the area of the exhaust inlet and calculated how many 1/4" holes would be needed to equal the total area (I then drilled a couple more for good measure). I was quite pleased with the results, since the original Honda exhaust had gone to its reward several years earlier.

Ron B · 08-11-2016, 07:36 PM

A question for CSCdude, if i want to do this to my bike, will it void my 2 yr warranty?

2LZ · 08-15-2016, 01:19 PM

I've been messing with the baffle more. As pictured above, I ran the row of holes to the end, on all three rows. I played with the spark block moving it into different spots. The best it ran, with the best throttle response was obviously in the last location, with the most holes exposed.

So yesterday, I decided to drill 3 more holes each, between the rows of holes, adding some intermediate exit holes. (9 total)
I'm not sure if it changed the running personality....but it sure made it louder to the rider.

Odd thing was, Mrs. 2LZ was behind me on the TT and neighbor Ron was also back there on Q...and both said the RX3 was very quiet to them. Ron said the TT was louder with the new pipe. Boy, you couldn't have told me that from where I was sitting. Mrs. 2LZ rode the RX3 later in the day and said that it is loud in the riders seat. I was on the TT and it sounded nice and quiet when I was behind it. Weird.

The muffler exits about the same place the stock one did. I'm thinking of moving it back further past the bag to see if I can move some of that noise away. Other than that, so far, happy.

Juanro · 08-15-2016, 08:20 PM

Are you sure the noise you're hearing as rider is not from the intake?

2LZ · 08-16-2016, 10:56 AM

Quote:

Originally Posted by Juanro

Are you sure the noise you're hearing as rider is not from the intake?

That's a possibility but it's not a sucking sound, definitely has the pop and rhythm of the exhaust note. I'm wondering if it's echoing more because of the sound being trapped between the empty bag (like a drum) and the bike. I'm going to remove the bag and see if it changes.
I did move the spark block last night up one row to cover 9 holes and it seemed to cut the shrill note. It's not that it's too loud, per se...but it's the new tone after the additional holes that kind of sharp to the ear.

Azhule · 08-16-2016, 12:20 PM

Sound from the muffler should be directed BACK and AWAY from the rider... something isn't right from the sounds of things

I'm wondering if the new muffler has a 'complete and proper seal' around the 'muffler / mid-pipe section'... it could explain why the noise is louder for the rider and not those behind you, might be letting exhaust/sound waves out and back towards the rider if the muffler has any kind of gap around it and the exhaust pipe

?? Just a thought from someone a thousand + miles away, maybe start the bike and use your hand around the muffler and other exhaust parts to check for any air leaks ??

08-10-2016, 12:24 AM	#20
2LZ Join Date: Mar 2010 Location: Volcano, Ca Posts: 7,112	Baffle Tuning Ok...so I was thinking today....there's no reason not to get full tuning ability out of this baffle setup. Like with a Super Trapp, you install and remove plates to adjust backpressure for tuning purposes, this little baffle offers much of the same ability but instead of removable plates, you treat it like a recorder (flute type instrument). It has a movable plug. :-) So, back to the drill press and I drilled as many more rows as I thought necessary to achieve prime objective, plus, every other hole I drilled a tad larger to help with the fine tuning, minus the first three rows. Anal? Oh yah....but fun all the same. Theoretically, the more back pressure (more holes you block on the flute), the less top end you'll have, while on occasion gaining mid-range or even a little low end in a carburated model. Hopefully the O2 sensor will play. I took it out after opening the baffle all the way (plug installed in last location opening as many holes as possible) and man....it really opened up the top end (butt dyno). More frisky and crisp, especially between 6 and redline. Drawback? It got a little noisier but not a ton. Just more shrill. Tomorrow, I'll move the plug up to block off two rows of holes and see what that achieves. It SHOULD lose a little of the top end but it will probably quiet it a bit also. We'll see. This is fun............ "2LZ at Play". __________________ "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 Last edited by 2LZ; 08-08-2017 at 03:58 PM.
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08-10-2016, 11:06 AM	#21
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	Brilliant! I never thought of moving the plug. I like your vee block. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
	0

08-11-2016, 12:47 AM	#23
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	I might need to make a block like that. I have two that are made from steel, but I can see uses for wood. It would be interesting to find out the tolerance of the stock O2 sensor. The next step is a wide band. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
	0

08-11-2016, 12:29 PM	#25
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	I'm with you on the bullet shape. My old Gio quad had that in the stock muffler, which I cannibalized for my XL250S project a few years ago. In that case, I measured the area of the exhaust inlet and calculated how many 1/4" holes would be needed to equal the total area (I then drilled a couple more for good measure). I was quite pleased with the results, since the original Honda exhaust had gone to its reward several years earlier. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
	1

08-11-2016, 07:36 PM	#26
Ron B Join Date: Mar 2016 Location: Tuscaloosa Al. Posts: 433	A question for CSCdude, if i want to do this to my bike, will it void my 2 yr warranty? __________________ Wingless Hawk, 2016 orange RX3, 97 wide glide,2003 KLR
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08-09-2016, 12:53 PM	#16
oregon Join Date: Jul 2016 Location: Salem Posts: 2	do you think this would work on a CSC TT250 ????
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08-15-2016, 01:19 PM	#27
2LZ Join Date: Mar 2010 Location: Volcano, Ca Posts: 7,112	Update: I've been messing with the baffle more. As pictured above, I ran the row of holes to the end, on all three rows. I played with the spark block moving it into different spots. The best it ran, with the best throttle response was obviously in the last location, with the most holes exposed. So yesterday, I decided to drill 3 more holes each, between the rows of holes, adding some intermediate exit holes. (9 total) I'm not sure if it changed the running personality....but it sure made it louder to the rider. Odd thing was, Mrs. 2LZ was behind me on the TT and neighbor Ron was also back there on Q...and both said the RX3 was very quiet to them. Ron said the TT was louder with the new pipe. Boy, you couldn't have told me that from where I was sitting. Mrs. 2LZ rode the RX3 later in the day and said that it is loud in the riders seat. I was on the TT and it sounded nice and quiet when I was behind it. Weird. The muffler exits about the same place the stock one did. I'm thinking of moving it back further past the bag to see if I can move some of that noise away. Other than that, so far, happy. __________________ "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
	0

08-15-2016, 08:20 PM	#28
Juanro Join Date: Oct 2015 Posts: 321	Are you sure the noise you're hearing as rider is not from the intake?
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08-16-2016, 12:20 PM	#30
Azhule Join Date: Dec 2015 Location: CO Posts: 1,525	Sound from the muffler should be directed BACK and AWAY from the rider... something isn't right from the sounds of things I'm wondering if the new muffler has a 'complete and proper seal' around the 'muffler / mid-pipe section'... it could explain why the noise is louder for the rider and not those behind you, might be letting exhaust/sound waves out and back towards the rider if the muffler has any kind of gap around it and the exhaust pipe ?? Just a thought from someone a thousand + miles away, maybe start the bike and use your hand around the muffler and other exhaust parts to check for any air leaks ?? __________________ "Think as you like... but this self proclaimed Professor is always right" - Buckshot "You never know what someone is hiding beneath their smile..." - NinjaTom - R.I.P.
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