Favourite brands? Best performance? Cheapest and trashiest? Best at messing up a bike's performance? Best at making it difficult to tune the bike without a lot of hard and very boring work? Best made? Was Shervin right-holes are better?

Since oil and tyre threads are boring these days, I just thought I'd start a similar but not yet happened theme. 

I've had a series of replacement exhausts-Termighoni, Akrapovic, noisy ones, didn't last a season ones.

It would be nice to hear people's experiences, including stuff they overheard down the pub one night, ill informed speculation, rumour and dislike of the look of the thing.

Ok, let's take this thread in an interesting direction. Saw a beautifully welded pipe on a Tuono on a thread a while back, found out it was a Danmoto GP exhaust. Had to have it. Turns out...

Was only $126!

So I bought it. It's a mid pipe and slip on, also bought the optional baffle because I am not a total asshole.

Anything I need to know prior to install? Do I need copper grease or high temp silicone or what not in between the pipes? I have a spring puller from my kids trampoline so that should be helpful...

Anyway, all suggested help appreciated. May handle this one at the entropy lab where experience and some wisdom is available for guidance when I wrench...

-Dan

Crappy: Cobra

Not Crappy: Leo Vince

I honestly never understood trying to buy mufflers with sound as the first property of importance. Weight would be the first consideration, I'd think.

Some bikes really do sound anemic with a stock exhaust, but I put the LVs on my KTM to save a bunch of weight (dual exhausts with a cat in each one) and heat (from the cats). No worries about my luggage melting/cooking with the LVs. The fact that they sound really nice (IMO) is a bonus.

Nope, I really didn't. If I could ride an electric bike that makes zero engine noise, I'd be perfectly happy with that, too.

Quote from: chornbe on April 22, 2014, 08:56:28 AM

I honestly never understood trying to buy mufflers with sound as the first property of importance. Weight would be the first consideration, I'd think.

Weight is my first priority and sound is often times a pleasant type of collateral damage. 

Yeah, don't get me wrong.... I *like* a nice sounding bike; there just aren't that many of them. I wouldn't ever spend hundreds upon hundreds of dollars trying to tune to a sound. If it sounds nice after I trim weight (or other considerations), then so be it.

I also think trying to make a small-bore I4 sound "good" is an exercise in futility.... to my way of thinking. Some people like the scream/buzz of a little I4. I don't. Give me a nice deep big-bore rumble, and if I can't have that, then please just keep it as quiet as possible.

$.02/YMMV

My VFR came with a TBR carbon fiber slip on already on it. I also got the stock can. The stocker weighed so damned much I've never bothered even trying it.

Liz's 919 came from the PO with [starts with D and is an off-shoot of Akropovic]. I have a mental block about the name. Quality is meh... they're fine. Sound is... not to my liking. Not deep enough to be called "throaty" but not buzzy enough to be the ricer-mosquito-crap that you often hear. It helps that it's a 919 and not a 600 in that regard, too, I think. It sounds ok, but given my choice, I'd go back to stock sound.

I honestly never understood trying to buy mufflers with sound as the first property of importance. Weight would be the first consideration, I'd think.

This change is for weight, performance and looks, in that order.  Not a proponent of loud pipes, but the stock boat anchor is over 18 pounds and this danmoto is 2kg. Plus it's cheap and if I sell, can include the stocker.

You were thinking for Liz's pipe Delkovic.

And the Tuono is a twin. I can't see this pipe being any louder than the titanium race can I had on my last Tuono (set off car alarms loud) so it should be OK.


But the MAIN question - do I need to use a bead of RSV copper gasket sealant or just compression fit with the springs?

- Dan

I know this is an aftermarket exhuast thread that was probably created with tongue-in-cheek.

I have stock exhuast on my 2001 and 2007 VFR.  Sure, I might like a cooler sound, but the stock exhaust on this bike doesn't sound bad.  I don't see any cost-benefit gain in switching to a lighter exhaust for $500.  Does it allow you to get to the next red light that much faster?

 

What about for a bike that is used on the track, when the exhaust costs $126 plus shipping? And it looks great, even if I don't expect the quality to quite match the aesthetics...)

14 pound weight savings ain't too shabby either.

Put an alum Yoshi slip-on on my CBR600RR.  Fit/finish was good, installation was easy (for an undertail exhaust) and it ran great without any tuning changes (FI bike).

CBR1k came with an Akro Ti system on it so I didn't have to mess with it much.  It had been dyno-tuned with a power commander and had tons of power (157hp on the dyno chart) but had an annoying stumble off idle (right where you pull out).  I had to eaith drag race launhc it or have it fall on its face as I pulled away.  Didn't like that.  I've heard that was a CBR1k issue so I don't know if the pipe/tuning was entirely to blame.

Side note - the new cross-place R1's sound great with a pipe - more like a twin than an I-4.

Side note - the new cross-place R1's sound great with a pipe - more like a twin than an I-4.

That is the only reason I want an R1. If I had one, I would run an obnoxiously loud pipe on it. I wouldn't use it much, but when I did.....

Josh Hayes' Yamaha last year at NJMP sounded like pure sex, second only to the Buells that just have a sound all their own. Ducati, take a lesson. You're not doing it so very right any more.

+1.

Since ANY aftermarket is going to save weight compared to stock on my 14, I think I'll just go with something i different.... Graves. definitely no cheap, but very unique compared to everything else I see around here.

Ok, let's take this thread in an interesting direction. Saw a beautifully welded pipe on a Tuono on a thread a while back, found out it was a Danmoto GP exhaust. Had to have it. Turns out...

Was only $126!

So I bought it. It's a mid pipe and slip on, also bought the optional baffle because I am not a total asshole.

Anything I need to know prior to install? Do I need copper grease or high temp silicone or what not in between the pipes? I have a spring puller from my kids trampoline so that should be helpful...

Anyway, all suggested help appreciated. May handle this one at the entropy lab where experience and some wisdom is available for guidance when I wrench...

-Dan

Dear Customer,

Thank you for your order.

To help you keep track of your purchases, we're sending you this email notification
Your order with the reference number WEB has been dispatched.

It was shipped with EMS Express. You can follow the shipment on www with the tracking number EA0.

The package will be delivered by your local post office. The supplied tracking number will mostly also work in their tracking system.
Shipments will be delivered mostly within 2 weeks.

With best regards
"Danmoto INT HK Limited" <danmoto.hk@gmail.com>


Looking forward to this.

- Dan

Uh, okay. What are you looking forward to?

I'm looking forward to this: just bought a pipe and it's en route.

Looks like this (though on a regular, non dual sported Tuono like this one):

visitors can't see pics , please register or login

Ok, let's take this thread in an interesting direction. Saw a beautifully welded pipe on a Tuono on a thread a while back, found out it was a Danmoto GP exhaust. Had to have it. Turns out...

Was only $126!

So I bought it. It's a mid pipe and slip on, also bought the optional baffle because I am not a total asshole.

Anything I need to know prior to install? Do I need copper grease or high temp silicone or what not in between the pipes? I have a spring puller from my kids trampoline so that should be helpful...

Anyway, all suggested help appreciated. May handle this one at the entropy lab where experience and some wisdom is available for guidance when I wrench...

-Dan

Sounds amazing!  But there is a leak between the exhaust pipe and the mid pipe where the springs are weak.

I have to remove it anyway, to add the baffle (it sounds great, but it's a bit loud...ahem) so maybe I can get it to fit better. Maybe it moved a bit when I mounted it to the passenger foot peg mount.

Worst case scenario,min have that cooper rvt sealant stuff.

- Dan

Leo Vince Carbon Fiber on the pig.

14 pounds lighter than stock
Same dB with the quiet insert in.  (although the tone is markedly deeper)
Louder, but not LOUD with the insert removed
A few extra horses up top (like the bike really needs it)

and most important to my passenger is that it's over 300 degrees cooler so her feet don't cook.



Money well spent.

 You can get springs in different lengths from anyplace that caters to dirt bikes. A generous amount of black silicone on the pipe end that slides into the can will help too just let it set for a day before you fire it up.  Any excess is easily trimmed.

Haven't done the gasket sealant yet - wanted to ride it first. With the baffle in I took it out for the first hard ride with the new exhaust. Sounds excellent, looks good, but the important part - impact on performance - is, well good but a little confusing.

Bike does not seem faster, does not seem to have more power, maybe even the opposite. BUT, at the same time, it's much easier to ride. Power delivery is much much smoother throughout the range - flat torque curve like the Sprint, actually. Bike still feels plenty fast, but there's no apparent rush (or dip?) anywhere in the rev range. I'm using an excellent chip made for open aftermarket pipes on the Tuono, so fueling is not an issue.

Am I missing something? Is it possible the smooth power delivery is masking any increase in power? I'm thinking this is the answer - my butt dyno is far from well calibrated. I like the way it rides much better, but I do take this bike to the track so I performance is important.

Make sense to anyone? Other than adding a TOR exhaust to my Sprint along with the proper tune to correct fueling (which gave a mild increase in noticeable pep), I've never changed an exhaust. I did add the chip and derestrict the stock exhaust on the Tuono last year, which provided a noticeable increase in power and a better (but not even close to this) torque curve

I'd really appreciate some comments on the above experience. I'm definitely happier with how the T rides, it just didn't match my expectations (other than the sound, which I really liked as well).

Thoughts?

- Dan

I went out on a limb and have a GPR on my VFR, Italian company makes scooter parts, but has some racing cred in Italia. I have been happy and the price on Amazon, shipped from Euro, was very good for the quality.

OK, I know that this thread is historic, but I have a question regarding slip on exhausts on a FI bike.  I'm posting on this olde thread so to keep the topic together in one place.

I'm considering a Yoshi Street Alpha T slip on exhaust for my Ninjette 400. It slightly reduces weight, reduces size & bulk, has a nice low tone, and brings modest to slight increases in horsepower, and more importantly torque.  It's also EPA & CARB compliant for those of us who like not polluting more than we have to (I go with the assumption that every mile ridden on a motorcycle, even just for fun, is essential to the betterment of humanity and so the resultant pollution is unavoidable) (I also don't hate my neighbors  https://www.bing.com/videos/search?q=neighbor+hater+exhaust&&view=detail&mid=9ED97F79A73725159A149ED97F79A73725159A14&&FORM=VDRVRV).

My concern is with fuel consumption.  Assume a disciplined rider who is keeping to the same speed under the same conditions.  Theoretically a gain in power without changing fueling implies that the slip on may increase mileage at the same speed under similar conditions.  This is helpful with a small tanked bike that will be taken on IBA rides or which may visit the plains states or the Rockies where gas stations are few and far between.  But when I did the exhaust on my first bike, a Honda Shadow Aero 750, I gained power while significantly loosing mileage and range.  The difference was that I also freed up the air intake and rejetted the carbs in addition to the Cobra pipes. I believe that this basically made my bike hungry for gas under the same circumstances.

So, would a slip on alone for my Ninjette, without changing the air intake or remapping (Yoshi says remapping is not needed with this exhaust), also reduce mileage or would it be the same or even improve?  Anyone have actual experience here?  I emailed Yoshi, and they said that they only test for power changes, not fuel consumption.  And the web is full of statements both ways without providing evidence, or even stating its from experience. 

Thanks, Miles. 

So, basically, the real benefits of a slip on seem to be limited to sound or looks, maybe a little weight loss.

Thanks, Miles. 
So, basically, the real benefits of a slip on seem to be limited to sound or looks, maybe a little weight loss.

YES this ^...
I think it's a great idea, go for it. 

Quote from: Baxter on October 09, 2019, 10:47:58 AM

Thanks, Miles. 
So, basically, the real benefits of a slip on seem to be limited to sound or looks, maybe a little weight loss.

YES this ^...
I think it's a great idea, go for it. 

St2sam, thanks but $500 just to lower the pitch and drop 3 pounds might be too much for my partial Scottish ancestry to get on board.  But I've probably spent more on impractical things before.  And now's the time to consider these changes because I can amortize the cost over the next 10 or more years.

Can anyone guess that I'm torn?  And that I'm really good at justification?

Aftermarket slip on?  Skip it.  For $400 or thereabouts, you can have a nice long weekend road trip and stay under the popo-dar.  I like stealth. 


I've had them on used bikes, but I never bought them.  One (the KLR) was obscenely obnoxious, killed the power and quickly got removed for a nice used stock replacement. The POS aftermarket got tossed in the recycling bin.  OTOH, the Yoshs on the Trophy were not obnoxious and didn't offend my sensibilities or hearing.  Same with the Remus system on the 1150GS.