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  See more parts for Kawasaki KLX140
Select the year of your Kawasaki KLX140:
FMF Kawasaki KLX140 2008-2025 Mini PowerCore 4 - 042161

FMF 042161 Mini Powercore 4 

Overview
Transform your Kawasaki KLX140 into a power-packed performer with the FMF 042161 Mini Powercore 4. Designed for riders who demand more from their mini-moto, this slip-on muffler drops pounds, boosts torque, and sharpens throttle response—all while maintaining on-trail legality.

Key Features

  • Hi-Flo stainless steel core & formed end caps: Engineered to enhance exhaust flow and reduce backpressure, delivering a noticeable surge in power and throttle crispness.

  • Aircraft grade aluminum canister + stainless mid pipe: Offers a featherweight setup that's both strong and corrosion-resistant

  • Spark arrestor version: U.S. Forestry–approved, maintenance-free stainless screen lets you ride legal on public land.

  • Weight savings (2.9lbs): Sheds several pounds versus stock, shaving unsprung weight for sharper handling and reduced rider fatigue

  • Rugged construction: MIG/TIG-welded header and durable packing ensure long-lasting performance on trails and tracks

Performance Impact

  • Offers consistent HP and torque gains across the RPM range, delivering more grunt off the line and mid range punch

  • Gives your KLX140 the feel of “a bored and stroked motor” right from the first twist of the throttle

Why Choose the Mini Powercore 4?

  • Bolt-on simplicity: Installs quickly with stock mounting points—no need for manifold modification or repack servicing.

  • Trail approved: Legal in spark-arrestor-required areas thanks to its built-in screen.

  • Best value in its class: Delivers high-end race-grade performance without breaking the bank

Ideal For

  • KLX140 riders seeking effortless power gains.

  • Competitive racers wanting weight savings and improved throttle play.

  • Trail enthusiasts needing a quiet, legal, durable exhaust.



Features:

  • Notice:Closed Course Use Only
  • Item ID:042161
  • Type:Slip-On
  • Spark Arrestor:Internal
  • Carb Warning:no
  • Weight:2.9 lbs.

 

Fitment:

  • MakeModelYear
    KAWASAKI KLX140 08-20
    KAWASAKI KLX140F 21
    KAWASAKI KLX140G 17-20
    KAWASAKI KLX140L 08-21
    KAWASAKI KLX140R 21-25
    KAWASAKI KLX140R F 22-25
    KAWASAKI KLX140R L 22-25

Other Part Numbers:
FMF Racing #79-1543

Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Vehicle
2008-2009, 2011-2020
 Kawasaki KLX140
2017-2020
 Kawasaki KLX140G
2008-2020
 Kawasaki KLX140L
2021
 Kawasaki KLX140R
Over the decades, we’ve seen an amazing transformation in the world of motorcycles and ATVs. The progression of the technology is one of the challenges that keeps us going. FMF was there in the days when the singleshock and watercooled engines were huge innovations and we’re glad to be here now for the aluminum chassis and electronic fuel injection. Our goal will never change – take the most advanced machinery to its limit by building the world’s best performing exhausts. And its a fact, we build every exhaust by hand from start to finish right here in the U.S. At the end of the day, there is always one major force keeping us motivated–throwing a leg over the bike and heading for the trails or the track. The biggest reward for us is knowing we’re helping our customers get the most out of their riding experience. We still ride every chance we get so we never forget why we got into this business in the first place.
LIMITED WARRANTY:
All merchandise manufactured by FMF Racing has a warranty against manufacturing defects for a period of one (1) year from date of purchase. Warranty is limited to the repair or replacement of defective products. There is no warranty for normal wear and tear, any type of crash damage or for product failure due to improper installation and/or maintenance. FMF Racing reserves the right to repair, replace or issue an FMF credit for defective product at its discretion. Credits are valid for a period of one (1) year from issuance. No credit will be issued for labor or other costs incurred beyond the value of the original product. Product returned as a warranty after having been used, if found to be defective, will not be valued at the full purchase price after one (1) year from date of purchase and a depreciated value will be estimated for used product. Product accepted as a warranty claim and repaired or replaced will be returned via ground freight no charge. Warranty excludes product that has been modified or where the product was improperly installed, abnormally used or misused or improperly maintained. This limited warranty is in lieu of all other guarantees or warranties implied or expressed. This includes, without limitation, any warranties or merchantability and fitment for a particular purpose. For products not manufactured by FMF Racing, there is no warranty expressed or implied though FMF Racing will pass on all warranties made by the manufacturer who has sole responsibility for performing such warranties. A return authorization number must be issued by FMF Racing before product is returned. Returns must be sent back to FMF Racing freight prepaid. Proof of purchase, such as a copy of the original invoice, must accompany all warranty claims. Warranties will be honored to the direct purchaser only.

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