DB Killers for Mid Pipe Motorcycle Muffler for Yoshimura or Other Exhausts

I tried out different slip-on mid pipe DB killers/silencers for a 51mm exhaust pipe to see what worked out best for my Yoshimura R77 racing exhaust on my Honda CB300R

[@doorstepmile]

Really thorough and systematic explanation! I have searched extensively across youtube. and yours is the absolutely best analysis of these inserts. Will be buying your recommended quiet version!

[@ChasingCurves.]

This is what I was looking for! Thanks for the helpful video!

[@MrAmorti]

Perfect helpful video. I also have a cb300r, I just put a 2" slip on Quill exhaust on there and even with the db killer it has too much BRAP for my tastes. I'm not so bothered about being heard, so I'll order up the quietest one you tested. Thanks!

[@SpyderRios]

Thank you for sharing this information. It's greatly appreciated.

[@davewestsk8]

Great stuff i just bought an aftermarket exhaust for mine started it up and thorght oh no what have i done so loud, ridiculously so. This video could lead me a quick solution to tone it down a little.

[@nakii7624]

same here dude, did it work?

[@coolstorybro9946]

Great video Stevo! Thanks

[@KEVWATCHES]

Thank you. Excellent video.

[@Astrix_Jaeger]

You know, that Yoshi by it's own baffles already sounded good, well in the video at least. I like the ramble too

[@stevofish7]

Yeah, pretty damn good! But still a little too loud for me..😄

[@iceicepogi]

Thank you for this

[@hablamelo8]

Thanks, nice video :)

[@simransidhu5654]

So good

[@tomdubois6666]

Thank you 👍

[@yalamburrrr]

Thank you 🙏🏼

[@Ro6entX]

After watching this video I recently bought the big boy at 7:12 for my full exhaust (‘12) R6 the other day and like it so much better than my M4 replica exhaust which was very loud and not ideal for town riding since it’ll be awhile before I go back to track again. Bit of a slight acceleration hesitation leaving from a stop and sometimes at high RPM but my ecu is still set pre-cat delete so thinking it’s due to that. Only thing I did was drill small hole in the end cap just in case. But point being, thank you for the comparison and demo 👍

[@stevofish7]

Appreciate your comments!! Hope you can get that slight hesitation worked out..may cost an extra "penny"...🙂

[@TheTruth175644]

Good to know, I’m ordering one of the big boys as well.

[@JinKazama92]

it definitely toned down the high rpms. :O

[@odgreenoutdoors20]

I like the third one better , I have a DG muffler and wan to silence mine like that

[@heliopires1516]

The last db killer tested in the night turn the the sound like in one 1000cc motorcycle

[@pibe8761]

Best comparison video in KZbin, thank you. If you'd compare 1st and 4th, how would you describe their volume, bass, and raspiness? Thank you

[@stevofish7]

For the 1st one it dampened the sound some on the high end, and the exhaust pretty much sounded the same. The 4th one provided better sound dampening with the closed end and still sounded good, but it didn't fit snug in the 50 mm slip on pipe and ya could hear it rattle in the pipe at times.

[@pibe8761]

@@stevofish7 so the ones with the mesh inside lower the high end volume slightly through out the whole rpms?

[@stevofish7]

@@pibe8761 yes, pretty much from what I can tell..just slightly..

[@KaLeB_]

thanks for your video, considering your results, i bought the number 2 and 3, ( the number 3 with round tip and bigger holes), and i did't like how them both sounded, the number 2 decreased the sound by 10% or almost nothing, and the number 3 decreased the sound too much, so a got my number 2 and worked it out, i welded a washer of stainless stell on the exit of it with a inner hole of about 20 milimiters and it got so well, it's not so loud and it's not low sound too, it killed a little bit of power, but it did less then the number 3 that kills a lot of power because of the 90 degree the flow is gotta do to find the way out of the pipe, the way the number 2 work the flow is straith foward and in high rpm's the sound appears and it's got so cool in my case, i hope it helps someone else, bye!!!

[@stevofish7]

Glad you were able to get it to work out for you!!

[@JoaoMPSilva13]

Hey hey, thanks for your comment! Would another solution not be getting number 3 and drilling holes to the bottom? Seems easier than welding a washer.

[@chrisdoree1079]

It would be interesting to know how much power you lose. Also, is the increased back pressure going to cause problems?

[@stevofish7]

I did not notice any reduction in HP or any issue from any increase in back pressure. Any new exhaust is going to have way less pressure than the stock exhaust with the catalytic converter, etc., so these inserts should not impact it much, if at all. Some of these inserts have that honeycomb cat in them. Although, I can't speak for every bike out there.

[@wokeupmens]

I got this Ryker. It has no gears as it's a CVT, so no down shift or nuteral. 3000-6500 RPM all the time. Which one was best at higher RPM at lowering sound?

[@stevofish7]

The tallest one with the closed bottom muffled the sound the best for me.

[@stevofish7]

Tho may have to try different ones to get the right one. The next one may be the other one with the closed end. Good thing they're cheap..😄

[@yogadianpratama4491]

can you insert the 3rd db killer from the front hole?

[@stevofish7]

Yes, if it fits and you can secure it. Normally, some mufflers come with a db killer at the front hole mounted by a screw, but it was still too loud for the Yoshi I got. The inserts shown on this video will not fit the front hole.

[@cesarcano6432]

Hi can you link me to the one that you chose that lowers the sound at higher rpms

[@stevofish7]

www.ebay.com/itm/353226277224 Here's the link. There are so many to choose from on eBay

[@magnum4405]

The two with the little wholes are really really restrictive and create a lot of backpressure

[@guanqiaowang7586]

Is it possible to insert both and would that make it even quieter?

[@stevofish7]

I tried putting one in the muffler and the slip on pipe but the muffler did not fit on the slip on pipe very well. Can try the other end of the slip-on pipe but depends on the size of the opening.. wouldn't work for the 300.

[@dinosaffinardi1205]

I got cb250r n no silencer. I like to be heard on the road for safety reason. So which one is best? Actually i already bought the no. 1. Mmmm

[@stevofish7]

No. 1 or 2 will reduce it a little. I hear you about being heard for safety. In the end, you'll get use to the noise level with/without and so will your neighbors, maybe 😆

[@greenplastic6883]

Did you leave the yosha db killer in and used the other db killers in conjunction with it. Double db killer exhaust? Great video👍

[@stevofish7]

Thanks! I really can't recall as I no longer have the motorcycle, but I'm pretty sure I had both of them in there if they both could fit.

[@greenplastic6883]

Thanks for the reply .. ya I just want to reduce the weight as much as possible but keep the bike fairly quite .. why did you sell the bike? Curious

[@stevofish7]

The CB300 was a great bike, but it was time for an upgrade in power and got an 07 Suzuki SV650. Didn't want to have two bikes and sold it to someone who actually wanted to downgrade in cc's 😄

[@greenplastic6883]

Ya that’s exactly what I did with my cb. I had a 2020 z900 and what a great bike but just not a perfect fit for my riding/lifestyle..got the fast out of me at least for awhile 👍

[@sanansa4567]

does anyone know if they will fit on scooters as well ? I have a 50cc scooter but the manual doesn't indicate the size of the muffler. It says 51mm on some of these so is that the diameter of the exhaust at the point you attach these silencers? thanks. I need something as quiet as possible because I only go riding at night in my local neighborhood and I am concerned about disturbing my neighbors. the scooter is louder that I thought it would be. I am not concerned if there is a drop in speed performance using these, because I am riding slow (I don't need to max out the throttle).

[@stevofish7]

You'll have to measure the pipe at where you'll insert the silencer and hopefully the silencer will fit all of the way in the pipe. I recommend the 3rd (3rd works the best) and 4th ones to muffle the sound. Thankfully, they're not that expensive on ebay so you can get maybe 2 different ones to try out.

[@jimmyjames1807]

putting a slip on will only make the scooter louder not quieter

[@kratoz_858]

Can you rate the lowest to loudest db killer? I have the one on the rightmost. My muffler still has the bassy sound but i need it to lower to 5-10db.

[@stevofish7]

The first 2 starting at the left are pretty much the same where they only toned down the high end of the rumble some, but louder than the one on the far right that you have where one end is closed. The 2nd from right one reduces the sound a whole lot where there was no rumble at acceleration, so not sure if any of these will work for you..

[@kratoz_858]

@@stevofish7 my setup now is the rightmost plus i packed some steel wool to lower the sound even more but still bassy. Thanks 👍

[@Illness.og.]

@@stevofish7 the one that really silenced the exhaust, where did you get that? I want that one.

[@stevofish7]

@@Illness.og. got it on ebay. Search muffler db killer. There should be plenty of options there.

[@arifnajiruddin4371]

Is it the silent 1 cut the speed of the bike??

[@stevofish7]

I did not notice any difference in speed.

[@pour-g8677]

you think this inserts will save you from doing a remap?

[@stevofish7]

If you're finding that a possible remap is needed due to backfires, decel pops, or lower power after making mods to your bike, then this will not eliminate from doing a remap. It may help a little if you add an insert that adds backpressure that was loss due to installing an aftermarket exhaust. I was actually doing a little research for my Harley Sportster as I recently added a cheap after market Ebay slip-on and it was pretty loud and had decel pops. I found out about the Thunder Torque Inserts (TTI) that adds power back on the low end and may also get rid of the decel pops (tho they don't advertise it as not guaranteed). So, I'm gonna try to add a silencer and the Thunder Torque Insert and hoping for the best. The Thunder Torque Inserts looks pretty promising, but you can also make your own by looking up "lollipop set up on motorcycle exhaust" on KZbin. However, other threads said the TTI works better than making your own. Below are links to the TTI KZbin video and their website to purchase. Install TTI Video link: kzbin.info/www/bejne/rZCXhJaBoapqqK8 Where to buy the TTI: www.dkcustomproducts.com/thunder-torque-inserts-c57.htm

[@Nakamamotovlog]

What is the diameter of the opening? Main head opening?

[@stevofish7]

Depends on which main head opening you are asking about? The DB Killer and opening end of the Yoshi muffler to the mid-pipe is 51mm. If you're asking about the head pipe to the motor, each bike is different, so gotta measure..

[@SarveshNaik5]

Did you enter number 3 in muffler or pipe?

[@stevofish7]

I really can't recall. I would have placed the insert into whatever fit the best.

[@amen6846]

could you please send me the link of the 3 silenser? Tahnk you

[@stevofish7]

I got them on ebay. The one I got is not listed but there are plenty of similar ones as per the following link: www.ebay.com/itm/51mm-Universal-Motorcycle-Exhaust-Muffler-Pipe-DB-Killer-Noise-Sound-Eliminator-/334158721112?hash=item4dcd697058

[@amen6846]

@@stevofish7 thank you

[@icelandknight]

Just if people want to jump TO and BETWEEN the sounds... No extra baffle: 5:17 - Small baffle: 5:56 - Other short baffle: 6:45 Big baffle: 7:12 - Shorter big baffle: 7:47

[@westendinventor364]

All of the slip on cans you get from ebay will be way to loud as they are usually designed for modern bikes with a split muffler system. They are made as small as possible to reduce material and shipping costs. Baffles are not a solution as they create too much back pressure and you will lose performance and suffocate the engine. If you want the best running performance and silicencing the factory exhausts are best. Mid pipe baffles make no sense at all unless you have a primary muffler upstream from the secondary muffler/slip on. The purpose of the baffle is to trap gasses as long as possible within the muffler to increase sound absorption. If it's done before the muffler you trap gasses within the downpipes which does not serve it's purpose.

[@streetskin]

You're too old to ride a bike with an exhaust installed Pops.. Sell it, grab a hot latina and go to Barbados 'til the end of your (few) days.

[@stevofish7]

LOL Ya never too old to enjoy life son! I've gone through several bikes and now settled down on a loud HD Sportster 😂.

[@streetskin]

@@stevofish7 Well, you're never too old to "enjoy life" Pops BUT you're always too old to take our lives away with your poor driving reflexes. Please just sell it

[@KebabMoto]

thanks you for your video help me a lot.