kevtherev
Registered user
I know there's a number of posts/threads on whether a Euro 3 Acra will fit a Euro 4 bike and the consensus is that it will. Interestingly my local dealer says there's a slight difference in the pipe sizes (no doubt to try and get a sale) and that if fitted on a Euro 4 bike it will run hot. My question is why would it run hot? I don't understand why a Euro 3 Acra (with presumably less noise deadening material inside) would affect a Euro 4 bike in this way. Does anyone know?