FMF Q-Stealth 2T with 75 hours

[AZRickD]

Some post-race season R&R.

Time to repack the silencer.

The photos show slicing the outer then the inner wrapping.

While it looks all shiny and oil in the photo, to my naked eye, it looked pretty good. The baffle holes were not clogged.

FMF stuffs a lot of packing in there. The outer layer is a criss-cross fiberglass mat that I have seen in shops. Inside of that is the thread-like wrap that covers the inner baffle.

I didn't buy either type. Instead I have just a thick, white mat of MSR packing ($8).

As well, there is a portion of the old backing deep in the endcap-side of the baffle. I know from experience that this can get clogged and hurt revs, but I think that it is in pretty good shape and I just don't want to fool with it.

[spooly]

are u not taking off the endcap?? im interested to see inside that iv the same silencer and I repacked it recently but didn't rip the endcap off because I hadn't rivets on hand to replace..but I will be doing it this week.

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[forgiven]

Don't know if it is wrong in anyway but I repacked mine with 4 stroke packing material and it was very quiet right after repack.

[AZRickD]

The end-cap is riveted and I'm out of large rivets, so, yeah.

I looked at several textual and youtube tutorials. Nobody mentioned cleaning the baffle. Nobody mentioned that there might be old backing stuck in there, even though I know it happens and I know can cause backpressure issues.

That being said, I had 300 hours on my 2005 EC250 before I noticed the precipitous drop in top end. And at the time I was using cheap Home Depot fiberglass insulation.

[spooly]

I always use the home depot fiberglass....

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[AZRickD]

A lower-toned exhaust note. The US Forest Service will be pleased this weekend.

[Rick]

Originally Posted by AZRickD

A lower-toned exhaust note. The US Forest Service will be pleased this weekend.

Do you get close to the sound limit? Or just decided it was time?

[AZRickD]

A little of both. I noticed my sound check results gradually increasing from race to race. And, heck, I was curious.