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FMF Powercore Quiet Core Insert
FMF Powercore Quiet Core Insert

Current price:$35.99 Original price:$39.99
10% Off - Save $4.00
4.00 5 1
Rating: 4 out of 5 stars

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      Item #FMF002E

      1 Review

      4 out of 5 stars
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      All Reviews

      JohnnyB

      Verified Purchaser
      2 years 3 months ago Saratoga County, NY, USA
      4 out of 5 stars
      Ease of Installation
      4/5
      Style
      4/5
      Good Investment, Good Product

      Quieter than without, so, objective achieved. Installation was very easy, with one exception. With the insert fully in place (flange contacting the muffler), I still needed to elongate the screw hole about .030" so the screw would engage. That should be an easy & worthwhile adjustment in the manufacturing process for future customers.
      I'll keep an eye on the spark arrestor. If it becomes annoying to require frequent cleaning, it should be easy enough to remove.

      13 Questions

      • Answered:   13
      • Not Yet:   0

      Question asked by Thomas

      Question: What will fit my 2005 suzuki rmz-250 manufacture exhaust?
      Question asked Over 8 months ago
      Question answered by Paul
      User's contributor status: Top 1
      Question answered Over 8 months ago
      Answer: The FMF Powercore Quiet Core Insert fits only the the Following FMF exhausts:
      Titanium Powercore
      Powercore 4
      Q4.

      Neither FMF nor Suzuki offer a quiet insert to fit the original silencer on the RMZ250. To make your '05 RM250 more quiet, we recommend either the FMF Q Stealth Silencer or the Pro Circuit Type 296 Spark Arrestor.

      Question asked by coleman

      Question: FMF part number?
      Question asked Over 5 years ago
      Is this item manufacturers part number 040671? If not which insert has that part number?
      Question answered by MotoSportExpert
      User's contributor status: MotoSport Staff Expert
      Question answered Over 5 years ago
      Answer: No. FMF part number 040671 can be found here: http://www.motosport.com/dirtbike/FMF-HEX-Q4-Quiet-Core-Spark-Arrestor-Insert

      Question asked by yamahattr230

      Question: Will this product work with the powercore 4 that goes on my klx 140L
      Question asked Over 5 years ago
      Question answered by MotoSportRyanT
      User's contributor status: MotoSport Staff Expert
      Question answered Over 5 years ago
      Answer: No. The FMF Powercore for your Kawasaki KLX140L would be considered a "Mini" Powercore. This Quiet Core insert would only work with the FMF Powercore Muffers for full-sized 250/450 motocross bikes.

      Question asked by joker260

      Question: Works with spark arrestor?
      Question asked Over 6 years ago
      Does this insert work in addition to the spark arrestor on the powercore 4 or does the quiet insert replace the spark arrestor. If it does replace the spark arrestor, is there still a screen in it to prevent sparks?
      Question answered by MotoSportRyanT
      User's contributor status: Expert MotoSport Staff
      Question answered Over 6 years ago
      Answer: The quiet core would replace the spark arrestor insert so there is really not a way to run them together in the Powercore 4 exhaust. I would have to recommend looking into the FMF Q4 exhaust if you needed a quieter exhaust with a spark arrestor as well.

      Question asked by Dave

      Question: Needing allen screws to hold insert in.
      Question asked Over 6 years ago
      What size & are they available?
      Question answered by MotoSportExpert
      User's contributor status: MotoSport Staff
      Question answered Over 6 years ago
      Answer: Unfortunately that screw is not readily available for purchase through our books. For this specific item you can call FMF directly at 310-631-4363. The screw can also be obtained from a local hardware store. Its an m5x10 screw.

      Question asked by exstreme

      Question: Will this fit a 2010 rmz 450 suzuki stock exaust
      Question asked Over 9 years ago
      will this fit a stock 2010 suzuki rmz 450 exaust?
      Question answered by JesseC
      User's contributor status: MotoSport Staff
      Question answered Over 9 years ago
      Answer: no this will not fit your stock exhaust

      Question asked by Ruger

      Question: New DB law in Colorado Will this fit stock exhaust 06 CRF250R?
      Question asked Over 9 years ago
      Question answered by hondarob
      User's contributor status: MotoSport Staff Expert
      Question answered Over 9 years ago
      Answer: it will only work on a fmf exhaust.

      Question asked by Lonski

      Question: I have a FMF TI Powercore exhaust with header and megabomb - it is too loud - how can i quiet it down to around 96dB???
      Question asked Over 10 years ago
      08 KLX450. I also have what looks like a FMF quiet core insert but have pulled the muffler apart and it will not fit. I can take a photo of the exhaust and the insert if you like but the insert looks the same as the pictures i see on all web pages.
      Question answered by NJrider240
      User's contributor status:
      Question answered Over 10 years ago
      Answer: ^^^you may have bought the fmf quiet core for the ti4/factory4. it looks the same but has a different diameter. i have the insert installed on my 04 crf 250s powerbomb and factory 4 systme and it quieted it down substancially. i dont know the exact dB but it passes tech inspection for ecea hare scrambles, sooo....it works! they sell the quiet core for your exhaust, so it you want to spend the $25 its worth it.

      Question asked by TrailKing150

      Question: Will this work on a Factory 4.1 Titanium system?
      Question asked Over 10 years ago
      Question answered by james718
      User's contributor status: Expert MotoSport Staff
      Question answered Over 10 years ago
      Answer: Sorry this quiet insert will not fit the 4.1 systems. At the moment FMF has not release one yet. They've listed it as TBA.

      Question asked by themxer

      Question: Spark arrester
      Question asked Over 10 years ago
      does this come with a spark arrester
      Question answered by JesseC
      User's contributor status: MotoSport Staff
      Question answered Over 10 years ago
      Answer: no this is just a quiet insert, you would need to purchase the Ti Powercore spark arrester screen separately.
      Question answered by TrailKing150
      User's contributor status:
      Question answered Over 10 years ago
      Answer: Mine actually did come with a spark arrestor screen in it. FMF may have updated it more recently to have one
      1 - 10 of 13

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      # Part Numbers

      Product Variant Manufacturer Part #
      FMF Powercore Quiet Core Insert 040288

      California Proposition 65

      WARNING: This product contains chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm. Wash hands after handling. For more information, go to www.P65Warnings.ca.gov.