Muffler Insert

110 replies to this topic
  • Tom_Rowlee

Posted March 03, 2003 - 02:20 PM


Any one know the correct part # for the insert , my parts guy tried to order gyt-5tj93-75-00 and the reply was invaled part #. Maybe one of you guy's that alredy got one can help with the rite #?

  • The_Blue_One

Posted March 03, 2003 - 03:06 PM


I called Yamaha of troy with that part number.They showed it and ordered it should be to my door in a week.The local guys all said it didn't exist. :)

  • RLucky82

Posted March 03, 2003 - 03:07 PM


No I have the MegaMax ll ... doesnt fit right (melted my side #plate), its heavy and doesn't make a noticeable powerincrease(over stock uncorked). defintaly not worth the $250 or so i paid for it.

  • wayneoXCF

Posted March 03, 2003 - 03:49 PM


Got mine the other day, and wow is it quiet. Roads were still iced, so I have to wait for a ride report... :) But its still real hush.

  • TWSimpson

Posted March 04, 2003 - 04:56 AM


:) Got mine Saturday. Boy, is it quiet. Haven't had a chance to see if it makes any difference on power. Got Snow, need the moisture but it sure cramps my riding time :D

  • Tom_Rowlee

Posted March 04, 2003 - 12:09 PM


:confused:Re orderd it today we will se what happens may haft to try a difrent shop

  • Rich_in_Orlando

Posted March 04, 2003 - 01:21 PM


I adjusted the jetting today and the bike runs a lot better. Dropped the needle one clip and that cleaned up the mid range considerably. I left the pilot and main jets alone. It's still not as powerful as an uncorked muffler, but I was still able to loft the front wheel in all 5 gears. I think it's worth the trade-off.

  • starttman

Posted March 04, 2003 - 07:25 PM


i have a fmf powercore IV 2 with a powerbomb there an insert that will quiet that setup?


  • Storch

Posted March 05, 2003 - 06:54 PM


My insert is backorderd. Any on else have this problem? Has anyone taken a set of dimensions?

  • law_boy

Posted March 05, 2003 - 08:10 PM


Mine is backordered, too. They said call in April!?! It sucks to be impatient.

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  • jwriott

Posted March 06, 2003 - 06:05 AM


Mine is back ordered. My local dealer had no clue. The one a little farther South is going to order a couple.

  • Fryboy

Posted March 06, 2003 - 09:14 AM


DAMN IT !!!! I bought mine on 2/25 and was told 5-7days. Today just spoke to dealer and its been confirmed this thing is on massive backorder without any ETA. GRRRRRR! That really chaps my buttcheeks.


  • Rich_in_Orlando

Posted March 06, 2003 - 09:32 AM


I'm glad I ordered mine when I did. I placed the order on 2/24 and it arrived on 2/28. Looks like I snuck in under the wire.

  • Fryboy

Posted March 06, 2003 - 09:36 AM



Thanks for sharing that... It makes me feel much better.... NOT ! :) LOL j/k


  • MN_Kevin

Posted March 06, 2003 - 09:55 AM


So, which one of these is correct?

1 - GYT-5TJ93-00
2 - GYT-5TJ93-50
3 - GYT-5TJ93-75-00

  • Fryboy

Posted March 06, 2003 - 10:06 AM


NH Kevin,

I was told the part # was -



  • xr600r

Posted March 06, 2003 - 12:40 PM


the part # on package mine came in was..... GYT-5TJ93-75-00

  • ddialogue

Posted March 06, 2003 - 01:07 PM


In case anyone is interested, my local dealer has THREE of these muffler inserts IN STOCK. I'm sure it wouldn't cost much to get one shipped. Check them out at

  • MN_Kevin

Posted March 06, 2003 - 01:22 PM


Need some input:

I am currently running a FMF Power Bomb header w/ a Stroker SX-1 silencer.

This thing is JUST TOO LOUD. :)

I want to put an FMF "Q" Silencer on it, but w/ this new*t, I just don't know.

I am open to anyone knowing anything about the "Q" (isn't there a "new Q"??)

  • Rich_in_Orlando

Posted March 06, 2003 - 05:37 PM


After the POS my FMF Megamax II turned out to be, I don't think I'll ever buy an FMF product again. I've read on TT that the Q mufflers are pretty flimsy. Now that I've got the bike jetted right, I'm happy with the power/noise level the stock muffler makes with the new insert. And I don't have to worry about the muffler disintegrating out on the trail anymore or melting a hole in the right side panel. If you want my opinion, put the stock muffler back on, get an insert and dial in the jetting.


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