FMF Powercore 4 installation help??

6 replies to this topic
  • Dude

Posted December 01, 2002 - 09:11 AM


Just received a Powercore 4 off of Ebay and am having problems on the install.

1. The stock muffler clamp is too big. Where do I find one smaller?

2. It didn't come with the gasket between the muffler/header pipe. What should I use?

3. Is there supposed to be a metal sleeve inside of the rubber bushing on the rear mount?

4. The pipe comes really close to the rear brake reservoir. Should I relocate it, or is it OK

Thanks for your help.


Posted December 01, 2002 - 10:04 AM


1. Contact fmf for a replacement clamp
2. it doesnt use any gasket, thats why you need a smaller clamp.
3. no

  • Thumpleupagus

Posted December 02, 2002 - 05:11 AM


#2... I think the fit of the silencer to the head pipe is pretty poor. I tried to use a liquid exhaust gasket from an auto parts store (get the highest temp rated stuff you can find)-it worked fair, but it was red and looked like crap. Don't bother with the "tape" gasket made for exhausts-it melts right away.

#3... Yes there should be a metal sleeve to fit inside the rubber bushing at the rear mount. At least mine had one...

I agree with all the other answers.

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  • lewichris

Posted December 02, 2002 - 05:52 AM


use some high temp gasket maker silacone on the connection. Yamabond makes some just for exhaust.
That is what i used.

  • Dude

Posted December 04, 2002 - 02:33 PM


FYI, the stock 250F exhaust gasket fits perfectly into the FMF exhaust pipe.

Thanks for the help.

  • Thumpin'_Canuck

Posted December 06, 2002 - 07:39 PM


Dude, You may want to heat tape the pipe around the brake res. Mine was melted when I bought the bike. At least keep an eye on it for heat damage.

  • groundhog

Posted December 08, 2002 - 06:16 AM


I used a piece of exhaust gasket material (comes in small sheets from auto parts store) about 1" wide, wraped it around the pipe & used the stock clamp. I can re-use the gasket when I change my oil filter on the '00.

Have had no problems with an unprotected brake reservoir - on a YZ


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