Exhausts and Engine » Euro 3 and Euro 4 changes

Hi guys, so whats the difference between Euro 3 and 4 that makes AC Schnitzer say you cannot use a 3 silencer on a 4 bike?? surely the silencer isn't any different? I know there are fuelling changes but is it just a case of them saying it for legal reasons??

Phil

Zitat von PhilM im Beitrag #1

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Hi guys, so whats the difference between Euro 3 and 4 that makes AC Schnitzer say you cannot use a 3 silencer on a 4 bike?? surely the silencer isn't any different? I know there are fuelling changes but is it just a case of them saying it for legal reasons??

I have had both, and physically they are the same.

I have an aftermarket silencer on mine ( SC Project), it's the same unit from 15 to year 17 so.

Ged


Phil

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My guess is that specific silencers must be specifically approved and documented by the manufacturer to meet Euro 4 sound and emission requirements. They may even need to have an approval imprint on them. I bet that AC Schnitzer could be fined by the EU (or whomever swings the hammer in your country) if they approved an Euro 3 muffler on a Euro 4 bike. However, if you installed the older version on your new bike, I bet no one would be the wiser.

Euro 4s are not supposed to have removable db killers.