Maintenance & Technical > KX500 Original

FMF Pipe Fitment

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serafin:
Hi everyone.  Question for everyone that is running a FMF pipe. How well does it fit and mount up?  Does everything line up?  Is there any binding?  The reason I'm asking
is that I bought a Gnarly Woods (020055) and when I went to install it, it fits but things don't line up properly.  Meaning when you slide the inlet of the pipe into the exhaust port of the cylinder and attach the springs to it so that the pipe sits straight and flush into the exhaust port (new copper washer is installed) the stinger portion does not adequately line up with the opening in the sub frame where the muffler attaches to the stinger.  The lower exhaust mount on the cradle lines up as well as the mount by the rear shock lines up but the mount by the coil is way off.  The only way to make all things line up with the muffler in the subframe is to force the pipe into place which then causes the inlet of the pipe to not sit flush against the exhaust port of the cylinder.  I'm getting the feeling that this pipe when it was assembled it wasn't set in the jig correctly before they started to weld it together.  All comments are welcome.

Serafin

I'll try and get pictures later. 

ID KX500:
I think maybe it helps to remove the sub-frame so you can move the pipe more.  I finally found the sweet spot with alot of gentle persuasion.

81cr450:
I have a steel pipe fence post I can put the stinger down in & you can persuade the pipe just a bit with it. Just be gentle about it. The mount by the coil will take a small amount of moving with a hammer as well, brass faced hammer being ideal.
Or you might want to send it back & see if you can get a better fit, I wouldnt be suprised to see you get the same thing back though.

Foxx4Beaver:
Have you tried loosening all the mounts first?....I know on mine(FMF Gnarly),I find it easier to remove all three mounting bolts for the right side radiator and let it relax forward....I do this upon removal of the pipe too,only because my pipe to cylinder connection is snug,and the mount under the tank that's part of the pipe has hit my radiator before...luckily it did'nt puncture it.I would try loosening everything first and get it "relaxed"....and I agree with 81cr,you very well might get the same thing back if you exchange it for another.
I also can't gaurantee my advice is gonna work for you...just figured I'd share my procedure for removal/installation.
Foxx

Polar-Bus:

--- Quote from: serafin on December 04, 2011, 04:41:55 PM ---Hi everyone.  Question for everyone that is running a FMF pipe. How well does it fit and mount up?  Does everything line up?  Is there any binding?  The reason I'm asking
is that I bought a Gnarly Woods (020055) and when I went to install it, it fits but things don't line up properly.  Meaning when you slide the inlet of the pipe into the exhaust port of the cylinder and attach the springs to it so that the pipe sits straight and flush into the exhaust port (new copper washer is installed) the stinger portion does not adequately line up with the opening in the sub frame where the muffler attaches to the stinger.  The lower exhaust mount on the cradle lines up as well as the mount by the rear shock lines up but the mount by the coil is way off.  The only way to make all things line up with the muffler in the subframe is to force the pipe into place which then causes the inlet of the pipe to not sit flush against the exhaust port of the cylinder.  I'm getting the feeling that this pipe when it was assembled it wasn't set in the jig correctly before they started to weld it together.  All comments are welcome.

Serafin

I'll try and get pictures later. 

--- End quote ---

Something's gotta be bent. My FMF fits perfect. A way to tell if something is not right is that the pipe will burn a spot in the underside of the fuel tank back near the seat.

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