KDXRIDER.NET

Little bit of oil seep from engine where exhaust meets engine.norm??

Sounds like you need new o-rings. I always add some high temp RTV to the o-rings for the best seal possible. You dont want an air leak at this joint.

Its normal. You can fix it. It will only get worse and make a mess.
There are two o-rings on the pipe where it slides into the cylinder. There is also a copper washer that goes into the cylinder first and the end of the pipe presses against it.
You can fix it by making sure youre pipe is square in the cylinder. You may have to bend the pipe hangers or even the pipe to get everything happy all the way through to the silencer. I usually get the pipe right and then bend the pipe on the silencer to match.
New o-rings, a new copper washer, liberal coating of hi-temp RTV, and make sure the springs are good and you'll be good until the next time you run the pipe into a stump or whatever

KarlP wrote:Its normal. You can fix it. It will only get worse and make a mess.
There are two o-rings on the pipe where it slides into the cylinder. There is also a copper washer that goes into the cylinder first and the end of the pipe presses against it.
You can fix it by making sure youre pipe is square in the cylinder. You may have to bend the pipe hangers or even the pipe to get everything happy all the way through to the silencer. I usually get the pipe right and then bend the pipe on the silencer to match.
New o-rings, a new copper washer, liberal coating of hi-temp RTV, and make sure the springs are good and you'll be good until the next time you run the pipe into a stump or whatever

well, shucks. i hadn't thought about a poor seal caused by a bent pipe. thanks for pointing it out !


i wrapped the pipe with high temp silicon 'tape' (there is no adhesive, it melts into itself) and reinstalled it. so far i have about 15 hours on it, and it doesnt leak anymore goop.

good suggestions, thanks guys !

Ohgood-

wrapped the pipe with high temp silicon 'tape' (there is no adhesive, it melts into itself) and reinstalled it. so far i have about 15 hours on it, and it doesnt leak anymore goop.

I recently assembled a hybrid for a buddy of mine and remembered your post about that high temp silicon tape. That is what I used on the silencer to pipe junction. That stuff worked good, thanks for the post!

The OP is talking about the pipe to cylinder joint though, don't want to confuse anyone.

Does the 220 use the same O rings and gasket as the 200? I have an FMF Gnarly on the bike I just purchased but FMF doesn't seem to show a spring & O ring kit for the 220.

What kind of silicone tape are you using?
I looked on Amazon and there are so many options!

The 220 and 200 use the same parts

I used a Loctite product, bought it at Lowes

IDRIDR wrote:What kind of silicone tape are you using?
I looked on Amazon and there are so many options!

I don't have a spec, but I ordered out from an airplane supply company years ago. it's orange with a blue stripe, and about 1 inch wide

Thanks for the replays.I I was wondering if some black oil ooze was normal glad to hear that it is.can I match up o rings and copper washer at my local hardware store our are they special

Given the amount of heat at the exhaust connection, I wouldn't expect a hardware store O ring to work. An auto parts store might have some high temp O rings that would fit.

Thanks nwrdr.

Ideally you want Viton O rings. They're good for 400 degrees F. Buna is good too, but is only good for 225 Degrees F. Both are OK for petroleum products. Many hardware store O rings are only Neoprene, and they don't hold up.

I have some posted in the FOR SALE section if you're interested.