Maintenance & Technical > KX500 Original
Exhaust Gasket?
Uzi9mm:
Recently had an exhaust leak. Is the metal exhaust/crush gasket required? I have an FMF Desert Gnarly. I called FMF and they said no gasket is needed. Just use the O-rings and some high temp silicone. I was thinking of making a new gasket out of some exhaust gasket material from Napa but the new one will be 2x as thick as the stock metal gasket. What does everyone recommend?
GDubb:
I have wondered the same thing. I dont have a crush washer either and couldnt find one. I would think that as long as your pipe mounts still line up and you can stretch the exhaust springs to still fit then there would be no harm in a thicker gasket material and a better seal. My 2 cents.
-G
Danger4u2:
The exhaust gasket is copper. It's in there for wear. With all the vibration the copper will wear instead of the end of the pipe and more important the cylinder where it mounts. As far as a thicker home made gasket (should be copper) just make sure the o-rings are still in far enough to seal. I've never used silicone on my exhaust. Something is worn out for it to leak. O-rings, gasket, pipe end, springs, or cylinder. The pipe mounts are where this usually starts. The pipe mounts don't last long on my bike. I'm getting ready to ride Little Sahara Okla. Monday and Tuesday. When doing my pre ride and service check the mount under the tank is broken and the one by the cylinder is split and about to break. Check your mounts, if they are bad it might be that your pipe moves around when you ride and that could be the cause of the leak.
KX500freak:
--- Quote from: Danger4u2 on June 28, 2008, 03:21:49 AM ---The exhaust gasket is copper. It's in there for wear. With all the vibration the copper will wear instead of the end of the pipe and more important the cylinder where it mounts. As far as a thicker home made gasket (should be copper) just make sure the o-rings are still in far enough to seal. I've never used silicone on my exhaust. Something is worn out for it to leak. O-rings, gasket, pipe end, springs, or cylinder. The pipe mounts are where this usually starts. The pipe mounts don't last long on my bike. I'm getting ready to ride Little Sahara Okla. Monday and Tuesday. When doing my pre ride and service check the mount under the tank is broken and the one by the cylinder is split and about to break. Check your mounts, if they are bad it might be that your pipe moves around when you ride and that could be the cause of the leak.
--- End quote ---
im with danger ,
allways use one copper ringgasket.
and indeed the exhaust mounts are a week spot !
most important is to hang the complete pipe tension free in the mounts.
also the can must be mounted on without any use of force,
if there is tension in the pipe the force goes through the mounts and they snap :oops:
did this mount with my both k5s and never had a broken mount again :-P
Uzi9mm:
Thanks for the replies. 8-) The pipe mount under the tank is starting to split, one of the o-rings on the pipe is torn, plus the copper gasket is crushed out of shape and torn. I ordered a some mounts and some gaskets. The mount under the tank needs to be shimmed out a little. Anyone have any trouble with aftermarket pipes matching the mounts?
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