250-500cc FMF Gnarly question

Hey guys,

I just pulled the FMF Gnarly pipe off my bike because it's beginning to leak at the exhaust port. I see it has the typical double O ring and copper gasket set up. But, I was looking at the at the parts diagram for the stock exhaust and it looks like the stocker has a different set up. It looks like one O ring and a washer ahead of the pipe. I checked FMF's site and there are no O rings listed for Husky's. Can anybody tell me what to use for replacement O rings and crush washer?

since the port is the same size and Husky did the math for temperature rating on the seal I would go with two stock ones and call it good
the "crush washer" is to keep the steel pipe movement from destroying an aluminum port, use the stock one
aftermarket pipes are for tuning and typically they see you using oem stuff to fit it

i ran across fmf exhaust "o-ring and spring" kits on e bay- they listed none for huskys, but a bunch for all the jap bikes-all you have to do is figure out what bike has approx. same size exhaust port and u should be good. (they are rubber o-rings,probably not a precise fitment) didnt see any crush washers.
search "fmf o rings" in e bay motors. good luck! hope this helped

McMaster-Carr. Viton O-rings for KTM big 2t's FMF pipes are the following number:
part # 9263K739 (44mmx3mm)

Link to page:
http://www.mcmaster.com/#catalog/119/3478/=l0p1qp

Not sure if the Husky 250/300 have the same dia as the KTM pipes? I dug around on the oring page and figured out the same for my 125 fmf pipe, but can't remember the size off the top of my head.

$15+ a bit of shipping will keep you for a couple years or more, or share them with your buds

Thanks! Never thought of that route, I'll probably just measure the ones on the pipe now and order some of those.

http://www.athenaparts.com/eng/models/view/1865/husqvarna-wr-250

another possible option?? worth a look

while they do not sell them at least they show the size that is handy
try your local dealer, they were available for my 360, even in stock

I got some that fit the ktm,they don't work,too skinny