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Hey guys just got done with the rebuild and went ahead with a UNI,HMF,12t, airlid mod. And after riding it for 20 minutes I stopped and smelled something a little odd and found that there was a little steam or smoke coming from the pipe but didn't smell like oil to me. I guess my question is do these packed mufflers have a "break in" like the packing needs to get hot for awhile?
 

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It's probably packing. I repacked my FMF before I put it on, and it has a smell every time I ride. I haven't ever seen any smoke, but didn't really pay much attention. It should be fine.
 

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Don't worry, the HMFs do this. I forgot what it is, it's like an O-Ring or something. It's safe.
 
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