This.

Especially in the souther parts of Germany, many mountain roads in Austria, Switzerland and parts of the french Alps and Vogeses have massisve protests from locals, due to bikes beeing too loud. The problem became even bigger throughout C19, as biking was one of the few activities, people were able to do. Bike traffic and noise pollution skyrocketted. Now there are lots of places where bikes are temporarily not allowed to drive (mostly weekends), entire regions where noise limits are implemented and where bikes are constantly controlled for noise violations. Cops test your bike with a calibrated microphone to check, whether the sound aligns to what is written in the bike´s documents. Not passing that test will at best end up in a hefty fine. If violation is too high, your bike can be declared not road worthy/illigal in that area and may be trailered out of that zone (seen a news report on that topic, where a local needed to tow his totally legal bike from his house out of the no bike/noise limit zone, to be allowed to use is.)

Check the legal noise emmissions requirements in Germany, Switzerland or Austria (I believe, these are the most restrictive) for your bike and try to match that with an OEM exhaust. Fines are very high for violations.

Not sure, how about this noise pollution reduction movement is proceeding in skandinavia, but if they are going the same route, their fining system can be much more expensive, as they calculate your fine by your income.

Enjoy your trip.

Edit:

https://www.dr-big-shop.de/46_Auspuff.html

This german shop offers so called "decibel eater" for your DR 650.

With a silent bike, a foreign plate and a polite attitude you´ll be most likely waved through all over Europe.

Edit2:
find a list of roads closed or with limited access a for bikes in Germany and Austria here:

https://www.motorradundreisen.de/motorradfahrverbot/

This list is certainly incomplete and driven open source by this website. On it´s lower end you can take part in a petition, to vote against the new restrictions.

The leaving gov of Germany has signed a new law , which allows regional or local authorities to limit or shut down traffic temporarily or total in order to reduce any sort of air or noise pollution.

I´m sure, local authorities will make use of this new law, once the next season starts.

Thanks for the input.

I think the standard exhaust will be the go then, better to safe than sorry such a long way from home, last thing I want is to have hassle from the old bill.

Cheers

All the bike I've owned over the past 20 or so years, ridden several 100k km and travelled on world wide, as well as mainland Europe and UK, have had louder than standard pipes. On my triple (Triumph) and V Twins (old Af Twins and Transalp) they have had a certain roar On 650 and 400 cc singles loud too. An old 250 single dirtbike that I commuted on in England had an very offensively loud pipe .

I have never been stopped anywhere (UK or abroad) because of the pipe. Never really stopped for any reason by any plod. I also don't ride like a nutter. When travelling I try to avoid large urban areas: Less people, less cage drivers, less plod, more interesting scenery, roads and trails.

In the UK there have been so many police cuts, that you'll struggle to see any plod while riding. They seem to rely on cameras to catch people breaking "laws" on the road. I don't believe they record sound.

I think the OP is overthinking things too much. Leave the usual pipe on.

PS. If you want to park you bike in eastern Europe, I recommend Motocamp Bulgaria = Welcome to motosapiens.org | motosapiens.org

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