Jump to content
Sign in to follow this  

Muffler overheating ??? FMF burnt decals !

Recommended Posts

I recently installed a new aftermarket exhaust system on my 05' 450X.

I replaced the stock system with a FMF Powercore4 and Powerbomb Header.

I am pleased with the package weight loss/HP gain etc... I however noticed something on my last couple of rides. :worthy:

There was a distinct smell of burning ... I thought that the new E-Line Carbon fiber Heat sheild that I had installed might have been too close to the header and it was from there that I was smellin' the burn :banghead:

I went for another ride the day before yesterday where we spent a couple of hours rinding in up and down a huge sand pit / wall. after spending a lot of time Wide open Throttle at relatively lower speeds I headed home:ride:

As you all probably know, the FMF muffler graphics are in the form of a decal made of a heat tape material, which to date hadn't stuck very well,... I already had to trim some of the decal off because sand got underneath it....

Anyway this time the outboard side of the decal had burned :banghead:

Coincidence or not ... :)

What causes this ? is my muffler overheating ??? is this normal ???

I've already heard of people complaining that the stickers don't stay on, but the sticker had actually discolored w/ small boils on it.

Needless to say the remaining portion of the decals will be coming off, however

is this representative of another problem ????:D

any theories ??? :ride:

Share this post


Link to post
Share on other sites
I recently installed a new aftermarket exhaust system on my 05' 450X.

I replaced the stock system with a FMF Powercore4 and Powerbomb Header.

I am pleased with the package weight loss/HP gain etc... I however noticed something on my last couple of rides. :worthy:

There was a distinct smell of burning ... I thought that the new E-Line Carbon fiber Heat sheild that I had installed might have been too close to the header and it was from there that I was smellin' the burn :banghead:

I went for another ride the day before yesterday where we spent a couple of hours rinding in up and down a huge sand pit / wall. after spending a lot of time Wide open Throttle at relatively lower speeds I headed home:ride:

As you all probably know, the FMF muffler graphics are in the form of a decal made of a heat tape material, which to date hadn't stuck very well,... I already had to trim some of the decal off because sand got underneath it....

Anyway this time the outboard side of the decal had burned :banghead:

Coincidence or not ... :)

What causes this ? is my muffler overheating ??? is this normal ???

I've already heard of people complaining that the stickers don't stay on, but the sticker had actually discolored w/ small boils on it.

Needless to say the remaining portion of the decals will be coming off, however

is this representative of another problem ????:D

any theories ??? :ride:

you may be running hot especially if you have not re-jet yet.

Share this post


Link to post
Share on other sites

How long have you had the silencer installed? When the packing gets old not only does reduce less noise but surface temperatures also increase on the silencer and there is more vibration. If you have been running the silencer for 20 hours or longer its time for a repack.

Share this post


Link to post
Share on other sites

I re-jetted as per JD's recommendations:

Year:2005

Elevation:0-500ft

Temperature Range:40-80F

Smog (AIS):N/A (Canadian Model)

Airbox Modified Top:Yes

Airbox Modified Sides:Yes

Backfire Screen:Stock config.

Air Filter:Stock

Pilot Jet:45 (Stock)

Main Jet:170

Needle:JD Red

Needle Clip Position:4th

Fuel Screw Type:CRF's Only

Fuel Screw Setting: 1 1/8 out

AP Modified:Large o-ring (JD Kit)

Leak Jet:Stock

AP Cover:Stock

Exhaust Type:FMF Powercore 4 w/ powerbomb header

Exhaust Modified:N/A

Pink Wire Modified:no

I have put approximately 7-8 hours on the bike since the install !

I might not be necessarily due for a re-pack yet ? :)

Share this post


Link to post
Share on other sites
I re-jetted as per JD's recommendations:

Year:2005

Elevation:0-500ft

Temperature Range:40-80F

Smog (AIS):N/A (Canadian Model)

Airbox Modified Top:Yes

Airbox Modified Sides:Yes

Backfire Screen:Stock config.

Air Filter:Stock

Pilot Jet:45 (Stock)

Main Jet:170

Needle:JD Red

Needle Clip Position:4th

Fuel Screw Type:CRF's Only

Fuel Screw Setting: 1 1/8 out

AP Modified:Large o-ring (JD Kit)

Leak Jet:Stock

AP Cover:Stock

Exhaust Type:FMF Powercore 4 w/ powerbomb header

Exhaust Modified:N/A

Pink Wire Modified:no

I have put approximately 7-8 hours on the bike since the install !

I might not be necessarily due for a re-pack yet ? :)

did you buy the pipe new? i'd check the condition of the packing or call FMF if it's new

Share this post


Link to post
Share on other sites
did you buy the pipe new? i'd check the condition of the packing or call FMF if it's new

Yep ! Brand New ! both parts !

I ordered the header (Powerbomb) from the local bike shop,

and the muffler came new direct from the FMF factory !

Share this post


Link to post
Share on other sites
Yep ! Brand New ! both parts !

I ordered the header (Powerbomb) from the local bike shop,

and the muffler came new direct from the FMF factory !

i'd call 'em up man. it really sounds like a packing issue and at only 8 hours...:)

Share this post


Link to post
Share on other sites

Funny thing ... the sticker was only burnt on the number plate side !

It was hot outside during the last ride and my bike worked pretty hard !?

Low speed / High rev.

Could it be just inadequate clearance between the muffler and number plate ???

Share this post


Link to post
Share on other sites

Could it be just inadequate clearance between the muffler and number plate ???

that is one possibility but another is that if you went with an aftermarket number plate that you don't have that aluminum heat insulation tape behind your number plate.

Share this post


Link to post
Share on other sites

The FMF decal has since come off !

The number plate is still the stocker (with the heat tape backing), ... didn't seem to melt it !!

I think the new muffler is a bit closer to the plate that the stock silencer ...

I'm not going to worry about it too much for now.... as long as I don't melt the back end of the bike off I should be good to ride :)

Share this post


Link to post
Share on other sites
as long as I don't melt the back end of the bike off I should be good to ride :D

agreed :):worthy:

Share this post


Link to post
Share on other sites

the packing insulates the can from heat , if the sticker only burned on one side of the muff it must have a thin spot in the packing letting heat get to one spot on the can because this normally only happens when a muff is past due for a repack :)

Share this post


Link to post
Share on other sites
this normally only happens when a muff is past due for a repack

LOL :)

Share this post


Link to post
Share on other sites
LOL............. I didnt notice that :)

LMFAO :D

when people ask you what you do, i bet it's a joy to say 'i repack muffs'

ahha :worthy:

Share this post


Link to post
Share on other sites
the packing insulates the can from heat , if the sticker only burned on one side of the muff it must have a thin spot in the packing letting heat get to one spot on the can because this normally only happens when a muff is past due for a repack :)

I want your job:worthy: :D:worthy:

Share this post


Link to post
Share on other sites

I put a FMF pipe on my x and ran it for a year with no stickers burning. Eventually I bought the powerbomb header and after the first ride the sticker burned.

?????

Perhaps the power bomb is doing its job and flowing the exhaust (heat) away from the head faster then a stock header putting more heat to the can.

Agent Smith, Paul Turner? :)

Share this post


Link to post
Share on other sites
I recently installed a new aftermarket exhaust system on my 05' 450X.

I replaced the stock system with a FMF Powercore4 and Powerbomb Header.

I am pleased with the package weight loss/HP gain etc... I however noticed something on my last couple of rides. :worthy:

There was a distinct smell of burning ... I thought that the new E-Line Carbon fiber Heat sheild that I had installed might have been too close to the header and it was from there that I was smellin' the burn :banghead:

I went for another ride the day before yesterday where we spent a couple of hours rinding in up and down a huge sand pit / wall. after spending a lot of time Wide open Throttle at relatively lower speeds I headed home:ride:

As you all probably know, the FMF muffler graphics are in the form of a decal made of a heat tape material, which to date hadn't stuck very well,... I already had to trim some of the decal off because sand got underneath it....

Anyway this time the outboard side of the decal had burned :banghead:

Coincidence or not ... :)

What causes this ? is my muffler overheating ??? is this normal ???

I've already heard of people complaining that the stickers don't stay on, but the sticker had actually discolored w/ small boils on it.

Needless to say the remaining portion of the decals will be coming off, however

is this representative of another problem ????:D

any theories ??? :banghead:

Sounds like the muffler bearing to me. I would call FMF and ask them if they can send you out some ceramic coated ones.:ride:

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Reply with:

Sign in to follow this  

×
×
  • Create New...