I bought a 09 570 and already had an Ackropovic muffler which fit the Berg from my last KTM. I asked the Dealer where I bought my bike whether it needed to be tuned, and he said no. I personally thought that the bike should be tuned to the new muffler. The bike tends to stall in some low speed corners with certain throttle applications.
Exhausts and tuning with 09 injection
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