Triumph 765 RS exhaust noise test comparison - standard, EU spec Arrow and US spec Arrow
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- čas přidán 20. 10. 2017
- Triumph 765 RS exhaust noise test comparison - standard, EU spec Arrow and US spec Arrow.
This is a noise test comparison to show the differences between the standard exhaust, the Euro 4 spec Arrow and the US spec Arrow (with and without baffle).
Because microphones attenuate the recorded sounds to the same level, I have tried to do a reasonably scientific test to show the actual noise levels of each of the above exhausts. This has thrown up some interesting anomalies, specifically with the baffle in the US spec Arrow. With the baffle installed, below 9000rpm the noise levels are significantly reduced, but above that the noise level is substantially INCREASED compared to without the baffle. This is likely to be caused by the effect the baffle has on the pressure waves at high rpm.
It should be noted that every 3dB represents a DOUBLING of sound intensity.
Noise test equipment: TES 1351 sound level meter (calibrated same day).
All static tests were carried out at a distance of 60cm with the ride-by done at 310cm.
Standard exhaust:
Weight: 6.4kg
Idle: 76.4dB
3000rpm: 86.2dB
6000rpm: 96.0dB
9000rpm: 103.2dB
12000rpm: 109.2dB
2nd gear WOTto 12000rpm ride-by: 106.3dB
Euro 4 Spec Arrow:
Weight: 5.3kg
Idle: 78.0dB
3000rpm: 86.8dB
6000rpm: 97.1dB
9000rpm: 105.5dB
12000rpm: 111.6dB
2nd gear WOTto 12000rpm ride-by: 107.8dB
US Spec Arrow (WITH baffle)::
Weight: 4.9kg
Idle: 79.3dB
3000rpm: 87.3dB
6000rpm: 96.7dB
9000rpm: 105.4dB
12000rpm: 112.3dB
2nd gear WOTto 12000rpm ride-by: 108.5dB
US 4 Spec Arrow(WITHOUT baffle)::
Weight: 4.9kg
Idle: 85.9dB
3000rpm: 88.7dB
6000rpm: 98.2dB
9000rpm: 104.0dB
12000rpm: 110.6dB
2nd gear WOTto 12000rpm ride-by: 105.5dB - Auta a dopravní prostředky
Great informative video!!
Nice comparison 💯
Thank you for this vid, it helps alot ! thumbs up
Interesting that US spec without baffle is quieter at high RPM than Euro spec
Very nice!!!
Is there a need to remap for yoshimura alpha-t for this bike?
Well i have purchased a Triumph Street Triple 765 RS and will be installing Sc Project S1 titanium exhaust.. So can you do a comparison video with the stock and the S1 exhaust.. It will be really great to see the comparison.. If you do soo..
See my reply to that request in the comments below ;)
Does anyone know if there is a big difference in sound and DB between the 765 R / 765 RS ?
BTW this is a really nice video and great comparison. thank you very much for sharing.
Monika Hi Monika,
There will be no difference in the overall peak dB, as the R has the exact same exhaust silencer. The only difference between the engines is the manifold (headers) and the cams. The reason for this is to make the R model less peaky (with different exhaust scavenging to suit the more low end torque orientated cams). The only effect this will have on the dB level is that it will just change the rpm point where it is loudest compared to the RS, the overall sound level won’t be altered.
So the EU spec arrow does not have a baffle? I’ve had so many people commenting about me running around w/o baffle, but that’s how I bought the bike (EU). In Germany and NL the focus is mostly on: does this exhaust have a baffle yes/no and they (police) don’t really care if the bike is actually too loud.
Only the US spec one is removable - the EU version is welded in place.
@@MikeRT4 alright. However on mine there’s no sign of a baffle. Just one big hole..... should the baffle be visible on the EU version? How do I tell a US and EU version part?
@@ScarrrRS On the US version it has a small screw that holds the baffle in place that is readily visible. On the EU version it does not. Unless you specifically asked for the US version, you would have been sold the EU one.
@@MikeRT4 cool thanks. No screw or whatsoever on mine. I’m just going to assume it’s EU spec :)
Can you do the exact same tests with the SC Project SC1-R ? It’s a fantastic exhaust, but alas no specs like weight or dB or power / torque info on their website ...
Aditya Venkatraman The SC exhaust by all accounts is not only ear-bleedingly loud, but according to SC also requires the bike to be remapped, so sadly it won’t be one that we will be testing.
However, I can confirm that the next exhaust to be tested is the Scorpion👍.
Thanks for the prompt response ! From some of the blogs I have read and the guys who have actually tried this exhaust, I was told that the arrow exhaust remap provided by Triumph should be enough to manage the SC1-R, primarily because it increases the baseline for the fuel map, so theoretically, any flat spots or back pressure issues should be taken care off, sounds about right, wanted your opinion on the same / above logic ...
Although this may be true for the 675, the 765 does not have or need a remap for the Arrow exhaust. The ECU on this bike is sophisticated enough to do a certain amount of self learning, so you just have to run the adaption protocol on the 765 for the Arrow and most other slip-ons (which is starting the bike up after the exhaust has been fitted and without touching the throttle, let it idle for 12 minutes). As I understand it, the SC1-R is so free flowing, that it exceeds the parameters of the self learning mode, hence needing a remap. At present there is only one company that has cracked the code on the ECU to enable a remap by reflashing and that is Hilltop Motorcycles in Hinckley, otherwise you have to fit a Power Commander. There is no map available from Triumph (at present).
Thanks for this info, I’m considering the new Yoshi slip on for the 765, any idea if the relearning mode would apply to this slip on ? Thanks
Jim V Hi Jim, Yep, should work for the Yoshi as well, but be warned that from the comments I have read, the Yoshi is louder with the baffle in than the US Arrow is with it out, so you may find it a bit tiresome on long journeys, so may require ear-plugs LOL 😱
Great infos but.... don't ever do that again with a motocycle! it damage the engine