Melted my FMF PowerCore 2. Why?
Posted April 17, 2003 - 05:04 AM
Occasionally, whilst riding, a bolt might rattle out where the cannister mates near the mid-pipe, and that will emit a louder exhaust note.
Well, after my 100 mile race this weekend, by the end of it, the bike was noticeably louder, so I figured that I had rattled out one or more of those bolts (when mounted, they are under the right-side number panel, and not all that easy to see) so, last night I started to asses the damage from the race, and it seems like I have melted the pipe!
I took off the seat and side-panel, and all of the bolts that hold the cannister to the pipe/core were still there, but the aluminum all the way around the bolts was gone!
Here is a picture of that. (Bolts were in when I took the pipe off)
Then, when I took the cannister off the core, it appeared that all of the packing material had migrated towards the end of the pipe. Front half was empty, rear end was packed tight. Here is a picture of the packing material in relation to where it was inside...
I know that exhaust was still able to exit via the endcap, but I can see that much exhaust was also exiting out the front of the cannister, and that must have been what melted the cannister.
Did I pack the packing material wrong?
Is this a common problem?
I appreciate any input.
Posted April 17, 2003 - 08:53 AM
#1. The packing material might say to pack it loosely, but he said that one needs to get as much in there as you can.
#2. He said that packing material also provides vibration damping, and that my loosely packed material probably migrated a while ago, and that now vacant space up front was now a vibration hot-bed.
#3. Those new vibrations probably caused stress-fractures near the bolt holes, and that allowed the exhaust to vent, which probably blew the pieces out.
Yes, it was MSR SilentSport packing.
So, now I am pipeless.
Posted April 17, 2003 - 09:19 AM
You can get a stock YZ exhaust really cheap nowdays. They perform almost as well as any aftermarket pipe out there.(allbiet a bit louder mabye) Plus I dont think they look bad.
As a matter of fact, I put on on my bike a couple months ago. Nothing wrong with it.
Posted April 17, 2003 - 10:27 AM
I have a YZF can with one small dent. Pay the shipping and you are welcome to it.
Posted April 17, 2003 - 10:33 AM
Posted April 17, 2003 - 12:13 PM
Posted April 17, 2003 - 12:33 PM
Posted April 18, 2003 - 05:55 AM
I will use the YZ can until I determine what my long-term solution is to my new-found pipe problems.
Since I just cut a fat check to the Uncle, I gotta lay low on any purchases....
Again, thank you TC Trailrider.
Posted April 18, 2003 - 09:27 AM
Posted April 18, 2003 - 10:54 AM