Hi mate, did you notice any difference in the resonance level in the sound? I made this modification and I confess that at a certain speed the resonance is quite intense thanks
That depends on what you mean by resonance and where and how you're feeling it. I always wear ear plugs and do find that there is some bone conduction sound transmission coming up through the frame, up through the seat and up through my spine. If I lift my bum off the seat the noise goes away but most of that noise is road noise rather than exhaust noise. We're talking 4+ hours of riding before that starts to become a thing though. If I don't wear my ear plugs then I very quickly find it to be too loud and I fully expect that it because the sound goes down and back up. I haven't found it to resonate at any particular speed though so what you're experiencing may not be what I experience. I have quite a lot of brazing material inside and outside of the plates and that might stop it. Also I used a high temp rtv silicone when I riveted the units in. They could be damping things too.
I haven't noticed any difference. Realistically this change just increases the flow to that of a regular 50mm / 2" diameter aftermarket exhaust so the any change in performance should be roughly equivalent. Not than 4HP at max revs is that noticeable. That's barely more than 3%.
It's a lot of work to do for others. The per hour rate would be too costly. But for DIY time is free and I was on a riding hiatus for medical reasons (nothing negative) so I had plenty of time.
All you need is something to cut metal, and a welder really. Then the tools to take the exhaust off too. Or find a buddy with all said tools, a few beers and it’ll be done in a few hours. Hope this helps 👍
In russia you've probably got better access to people that would do this. Here in Australia most shops who could do this easily won't do it because they don't want to later get blamed for an exhaust that either is too loud or won't pass emissions or both.
I'm not really launching a channel if that's what you're asking. I've basically done everything to the bike that I wanted done and this is the last stage. From Australia btw.
Nice work @David, Thank you for sharing the process on your previous video. Have you noticed any difference other than the sound? I suspect the back pressure has been reduced by quite a bit and i was wondering whether there was any loss in performance / increase of fuel consumption? cheers Rick
The increased flow has made it a bit lumpy between 3000 to 4000 rpm. Above that it's the same. The flow means that more of what's sprayed into the intake leeches into the exhaust and it's actually a bit leaner. The o2 sensor sees that and thinks it's rich and leans it out a bit more. Fuel economy has not been impacted. The same effect hits when any aftermarket exhaust is installed. I looked into getting a flash/tune and people just saw me as a target to make $$$ off so I bought the Woolich tools necessary to play with it myself and am working my way through that. It's an eye opener for sure and I expect i'll be making some videos about that. Anyway. The first write to the ECU I did was to disable the closed loop, the top speed limiter (because why not) and the fan to 95 (on)/90 (off).| That seems to have smoothed it out. I recorded some more logs and will be looking at disabling the Fuel Cut to see what it does. It's handy to be able to make your own changes whenever you want.
wonderful sound,
As soon as I get back from the field and my exhaust goes in for reconstruction,
my wife will be overjoyed 🤦♂😁
Hi mate, did you notice any difference in the resonance level in the
sound?
I made this modification and I confess that at a certain speed the resonance is quite intense
thanks
That depends on what you mean by resonance and where and how you're feeling it.
I always wear ear plugs and do find that there is some bone conduction sound transmission coming up through the frame, up through the seat and up through my spine. If I lift my bum off the seat the noise goes away but most of that noise is road noise rather than exhaust noise. We're talking 4+ hours of riding before that starts to become a thing though.
If I don't wear my ear plugs then I very quickly find it to be too loud and I fully expect that it because the sound goes down and back up.
I haven't found it to resonate at any particular speed though so what you're experiencing may not be what I experience.
I have quite a lot of brazing material inside and outside of the plates and that might stop it. Also I used a high temp rtv silicone when I riveted the units in. They could be damping things too.
Amazing work! Sounds very good! Deep and loud music!✌️😎🎶
Good Job ! Brilliant minds think alike, but you did a lot more thinking than I did. Both videos were great......fellow aussie... thanks
Man, that sounds great. Have you noticed a power difference?
I haven't noticed any difference. Realistically this change just increases the flow to that of a regular 50mm / 2" diameter aftermarket exhaust so the any change in performance should be roughly equivalent. Not than 4HP at max revs is that noticeable. That's barely more than 3%.
Amazing job and sound, perfect! Would you do it for others? Thank you for the detailed videos
It's a lot of work to do for others. The per hour rate would be too costly. But for DIY time is free and I was on a riding hiatus for medical reasons (nothing negative) so I had plenty of time.
great job !! amazing sound
I'm curious how loud the sound of the exhaust has become in preparation for pure love
I got a better meter. It's about 95db
Super ! What modif you made exactly ? Thanks
Wow, nice job and its sounds sooo good man 🤩👍🫡
Could you, for any amount of money, produce a modification kit for purchase and shipping to Russia?
All you need is something to cut metal, and a welder really. Then the tools to take the exhaust off too. Or find a buddy with all said tools, a few beers and it’ll be done in a few hours. Hope this helps 👍
In russia you've probably got better access to people that would do this. Here in Australia most shops who could do this easily won't do it because they don't want to later get blamed for an exhaust that either is too loud or won't pass emissions or both.
What’s next? And where are you from?
I'm not really launching a channel if that's what you're asking. I've basically done everything to the bike that I wanted done and this is the last stage. From Australia btw.
This response aged well 🤣
Nice work @David,
Thank you for sharing the process on your previous video.
Have you noticed any difference other than the sound?
I suspect the back pressure has been reduced by quite a bit and i was wondering whether there was any loss in performance / increase of fuel consumption?
cheers
Rick
The increased flow has made it a bit lumpy between 3000 to 4000 rpm. Above that it's the same. The flow means that more of what's sprayed into the intake leeches into the exhaust and it's actually a bit leaner. The o2 sensor sees that and thinks it's rich and leans it out a bit more. Fuel economy has not been impacted.
The same effect hits when any aftermarket exhaust is installed.
I looked into getting a flash/tune and people just saw me as a target to make $$$ off so I bought the Woolich tools necessary to play with it myself and am working my way through that.
It's an eye opener for sure and I expect i'll be making some videos about that.
Anyway. The first write to the ECU I did was to disable the closed loop, the top speed limiter (because why not) and the fan to 95 (on)/90 (off).|
That seems to have smoothed it out. I recorded some more logs and will be looking at disabling the Fuel Cut to see what it does.
It's handy to be able to make your own changes whenever you want.
@@davidb3925 nice work, good thing about doing it yourself is the learning experience too.
Kudos!
Cheers