HEADS UP!!!

Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

Sign in to follow this  
Followers 0
02YZ426

New Muffler Getting Too Hot

12 posts in this topic

No my header is not glowing LoL. . I just put an FMF Q4 on my YZ and it gets so hot its starting to melt my number plate! First thought that comes to mind is that jetting may be out, but the bike runs great as is. The instructions also say no jetting changes are required. So I have 2 questions. For guys who run this pipe, do you have this same issue? And would adding some kind of heat shielding material to the back side of the plate be the proper fix or is there another answer? Just to note there is plenty of space between the number plate and pipe.. also the graphics on the pipe have almost melted off. Thanks in advance for your imput :thumbsup:

Share this post


Link to post
Share on other sites
No my header is not glowing LoL. . I just put an FMF Q4 on my YZ and it gets so hot its starting to melt my number plate! First thought that comes to mind is that jetting may be out, but the bike runs great as is. The instructions also say no jetting changes are required. So I have 2 questions. For guys who run this pipe, do you have this same issue? And would adding some kind of heat shielding material to the back side of the plate be the proper fix or is there another answer? Just to note there is plenty of space between the number plate and pipe.. also the graphics on the pipe have almost melted off. Thanks in advance for your imput :thumbsup:

it requires baffeling to quiet these bikes down , and baffeling causes the muffler to run allot hotter than a straight through design , its not a problem when trail riding , but it sounds like you are running your bike hard and its not uncomon to burn off the stickers and melt number plates when you run a quiet pipe hard , adding some heat shielding to the plate is about all you can do :thumbsup:

1 person likes this

Share this post


Link to post
Share on other sites

Thanks.. I didn't think of it that way. Anyone know of heat shielding that is sold specifically for something like this?

Share this post


Link to post
Share on other sites

How do you like the Q4 muffler, besides this problem?

Is it quiet? I'm really not worried about losing much power on a 450, I just need to quiet this thing down for the woods.

Share this post


Link to post
Share on other sites

your bike should have come stock with heat sheilding on the back of the number plate (mine is falling off big time so that might be why yours isn't there anymore)

Share this post


Link to post
Share on other sites

You can also use a spray ashesive and aluminum foil in layers just be sure to prep the surface and shiny side out.

Share this post


Link to post
Share on other sites
The 06's, at least mine, don't come from the factory with any heat shield behind the side plate.
That's how mine is, too. The add-on/replacement stuff from Maier or elsewhere will work, though.

Share this post


Link to post
Share on other sites
How do you like the Q4 muffler, besides this problem?

Is it quiet? I'm really not worried about losing much power on a 450, I just need to quiet this thing down for the woods.

I like it.. looks trick, no jetting changes needed and it seems to kill how far the sound carries. Its not very quiet when your standing beside the bike revving it though. From what my friends have been telling me its just quieter from a distance.

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

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0