Exhausts and Engine » are all 1200RS exhausts Euro4 compliant?

or any earlier ones Euro 3 ? and are they any better for power, smoothness
in theory all sold after Jan 2015 should be? just wondered if earlier exhausts might be a bit more free flowing (sportier), or is it the Cat in the downpipes that is changed? but would have to come off other model I think, sames goes for (compliant) after market exhausts I expect. You know what they say about curiosity.....
thanks

What? Can you repeat that?

My guess is that only BMW and various governmental spy organizations know for sure. But if you are worried about your muffler being too Euro4 compliant, just get out an 18" long electricians drill and start drilling holes in either end.

Euro-4 did not take effect until August, 2016. Basically, 2015 and 2016 are Euro-3. Some say that there is a performance difference between the older and newer RS models, but BMW claims that the performance is the same.

What I heard is that Euro4 requires less sound coming from the bike than did Euro3. I think what BMW had done is to program the exhaust back pressure valve to increase back pressure to as to cut noise at the rpm and speeds required by Euro4 regulations and likely open it up fully when the engine is at the power curve where maximum power is made. That might cut back power at lower engine speeds but would have no effect on the maximum power at high revs.

yes, so whats the best for smooth running and the most power, E3 I expect

I’ve heard that it is easier to remove the silencer on the earlier bikes. Remus offers a different exhaust slip-on for Euro-3 than Euro-4, but I’m not sure why. Perhaps the later item incorporates a non-removable dB-killer...

Zitat von Richard230 im Beitrag #5

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What I heard is that Euro4 requires less sound coming from the bike than did Euro3. I think what BMW had done is to program the exhaust back pressure valve to increase back pressure to as to cut noise at the rpm and speeds required by Euro4 regulations and likely open it up fully when the engine is at the power curve where maximum power is made. That might cut back power at lower engine speeds but would have no effect on the maximum power at high revs.

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