Just seeing if anyone has put a slip-on on their bike and were there any performance/sound benefits, and which ones? I’ve been looking at LeoVince and the Stubby Predator carbon, anything else out there?

TEC

 

Hi
Check out TEC in the UK. Fits easily, sounds great (ok I'm db killer out but it's still subtle) , looks cool in my humble opinion. DNA filter and snorkel binned.
Bike feels well perkier...

 

That looks awesome! I just checked the site and they’re saying it won’t work with a 2025 model due to an extra o2 sensor?

 

Their website lacks a bit of info but i found they answer tech emails really quickly ...Drop them a line or ring them if you're in the UK...
My only problem was Brexit induced import duty, 'cos I live in France..

 

It is easy enough the check for the second sensor on your bike. The first is located just as the pipe comes out of the head, the second is just before the cat. My 2024 does not have the second o2 sensor.

 

Same as OldGoldie...
I don't understand the technical logic behind their reasoning, maybe they just need more time to test..they did say they were going to produce a cat eliminating down pipe this year..but that hasn't materialised yet...
The cat weighs 7kg...I've lost 3 so far so maybe I won't be in the market!!

 

.I've lost 3 so far

congratulations! I too should go on a diet

 

Brought the pipe from Ali express £76 delivered to home address. Quality very good. Bit noisy with just rear silencer so fitted db killer now sounds fruity, just right. Performance wise not noticed a lot of difference. Very impressed

 

Bit noisy with just rear silencer so fitted db killer now sounds fruity, just right.

Does it come with a db killer or did you use another one? Is it much louder with the db killer? How's the fit? How much does it weigh? How much does the old one weigh?
Hope you don't mind all of the questions. TIA I am seriously thinking of getting one for my 400x.
The question "is it much louder?" was in comparison to stock.

 

The db killer I brought was from Amazon 42mm diameter and 140mm long, I put it in the rear silencer and secured it with an m6 Allen bolt through the wall of the silencer about 40mm up from the silencer clamp. With the db killer in it gives roughly the same rythemic note just a bit louder, I don’t do noisey exhausts and I think this sounds just right. Fitting the parts takes a bit of wriggling, but not to the degree you’re having to bend anything. Its weight is about 2kg and the old system must be at least three to four times that. I am impressed with the price, quality and fit of it. Like I said, I don’t think there’s a lot of increase in performance, but there’s quite a bit of saving in weight, and it does look nice.

 

Thanks Buzby! that answers my questions. I'd like to shed some weight, maybe run a bit cooler but I really don't want anything louder. BTW the weight loss will help performance.

 

Buzby, I've got another question for you. What did you or do you have plans for placing a rubber "bumper" for the side stand to rest upon when it is retracted?
TIA

 

Hi there
With the old exhaust/silencer removed there’s nothing for the side stand to hit. I did notice though that there’s an adjustable brass bolt on the side stand and what looks like a hard plastic block maybe side stand switch housing on frame which seem to come together.

 

Just an update. checked sidestand and found its stopped by the sidestand mounting bracket on frame. The switch and bolt must be a proximity switch because they don’t actually touch.

 

Buzby, thanks for the update. Just got back from looking at mine. I was thinking it might be a proximity switch. And plastic and thought it might be a bad idea having the side stand bouncing against it. Looks like the mounting bracket will keep it from making contact. I might try to rig up a little metal bit with the rubber bumper using the bracket where the cat was attached. Might be a while but if I do I'll post a picture.
BTW your bike is a LOT cleaner than mine at least from what I can tell in those pictures.

 

That should work well. My Honda Hawk GT has an aftermarket exhaust system made by M2. The stock centerstand stop is part of the original muffler. M2 provide an L-shaped metal bracket with a round rubber bumper bolted to it as a centerstand stop.

 

Look forward to seeing how you get on. Used to ride all year round, now only ride when it’s gonna be dry 😂 but it does keep the bike clean

 

I am the point where I'm fair weather rider. I ride strictly for fun. Lately it's been 33+ during the day, so if I ride its for a short one in the morning.

 

Just added a British Customs Predator carbon. I like it.

 

Hello and welcome to the forum from the UK.

When you have a moment, could you post some pics?

 

The pics are all recent since I’ve only had the bike a little over a month.

 

Ali Express sell a beautiful decat pipe in stainless steel to get rid of the big muffler underneath and the Cat.

This retain the stock chrome covers and can be used with the stock muffler. Works only for the model with One Lambda sensor

Which models use 2 sensors and what models only one.?I ordered the ALI systeem, looks like 3 pieces. Do I need to modify for the sensor at the downpipe ? What happens if you ride without any sensors?

 

Which models use 2 sensors and what models only one.?

Both models have 1 sensor right where the pipe goes into the head. On the one with 2 sensors you will find the second sensor just before it enters the cat.
this picture shows the location of the first sensor which all bike have.

looking at the left side of the second picture you will notice the the diameter of the pipe increases if there is a second o2 sensor it will be very near that junction. this one does not have a second sensor.

 

 

decat with stock muffler

 

biggest problem is the speakers (my computer) this is run through. I don't believe the whole spectrum of sound comes through. I wish he would have had a db meter, I would like do know the relative loudness of each system. Very informative none the less.

 

Brought the pipe from Ali express £76 delivered to home address. Quality very good. Bit noisy with just rear silencer so fitted db killer now sounds fruity, just right. Performance wise not noticed a lot of difference. Very impressed View attachment 2037

The db killer I brought was from Amazon 42mm diameter and 140mm long, I put it in the rear silencer and secured it with an m6 Allen bolt through the wall of the silencer about 40mm up from the silencer clamp. With the db killer in it gives roughly the same rythemic note just a bit louder, I don’t do noisey exhausts and I think this sounds just right. Fitting the parts takes a bit of wriggling, but not to the degree you’re having to bend anything. Its weight is about 2kg and the old system must be at least three to four times that. I am impressed with the price, quality and fit of it. Like I said, I don’t think there’s a lot of increase in performance, but there’s quite a bit of saving in weight, and it does look nice.

I am hoping your lead re db killer from amazon, 42 X 140mm.

 

we will see. in the very near future. I have ordered the Amazon db killer and I'll be plugging it into a speed 400 silencer. (I sold my 400x silencer when I got a LV). I had a LV with their db killer with the cat and it was just a bit louder than stock. I just installed the Ali pipe and it is too loud with the LV. Sooo I am getting a used speed 400 silencer (can't find a 400x) sticking the db killer in it.

 

I am still a little confused re db killer install. My db killer should arrive tomorrow. Not sure what "silencer means in UK. Is that Appalachian (USA) for muffler? which way does the long db killer extend when installed? Toward the front of bike or to the rear of bike?
About 40mm from which clamp, there are three. Center of clamp or trailing /leading edge / Drill the muffler for 6mm bolt or that center thingy? I have the same decat pipe as shown in your excellent photo. Thanks Buzby, all youins have been so helpful.

 

Hi all
Just to clarify where I put the db killer, see attached photos
Cheers buzby

 

 

Thanks Buzby!
That's exactly what I needed.
Your photos are sooo helpful. I am deaf in right ear.however I can measure my db level by the facial expressions of other motorists. I can tell when I am "that Guy".

 

I just tired a db killer installed oriented as the lower one as depicted in Scramd's picture placed at the second clamp so that it was inside the "muffler". Still too loud for me.

 

Is it loud out the back of the bike, or from under the bike?
Sounds like a silly question, but the noise you may be hearing is the exhaust gas reversion point "rattle" in the down pipe.
So...
If it is loud out the back of the bike, try adding a slightly radiused tube on the stinger out the end of the silencer to direct the exhaust back and down. Easy test with a muffler clamp before having an extension welded on.
If it is loud under the bike, look for the heat signature at the exhaust gas reversion point, and as a test try a fiberglass exhaust wrap at that point. Don't wrap it tight, and hold each end on with safety wire.
If that relieves your ears, you can go back and create a sound/heat shield for that point.

Hth, 🍻

 

It's coming out the back. I'm gonna try Buzby's solution. I waiting for a used silencer as I sold mine a while back.
BTW it sounds great it's just too loud.