Quote:
Originally Posted by Beer Brewer
I have the same issue. I brought it the dealer and they are going to replace the muffler under warranty - we'll see what happens with the new one. Sounds like a very common problem!
Pete
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I fixed the flap and set it open at all times with my JB4. Slight rattle on cold starts then nothing else. Not worth the time to go into the dealer to get that fixed..