Upgrade your motorcycle’s exhaust performance with the FMF Factory 4.1 Mini Slip-On Muffler, manufacturer part number 042382 and vendor part number 79-42382. Designed for select Kawasaki KLX140 and KLX140L applications, this tuned exhaust system combines FMF’s advanced Resonance Chamber Technology with application-specific core specifications to help deliver strong, refined performance while maintaining practical sound control.
The patented core shape helps lower sound levels without sacrificing maximum power output, while the patented canister shape provides additional internal volume for sound-absorbing material. A patented chamber design is engineered to enhance and refine exhaust pressure, supporting smooth power delivery across the engine’s operating range. The included titanium Megabomb is designed to further optimize power output for compatible machines.
FMF’s Factory Forward Engineering centralizes mass for improved packaging and helps reduce the likelihood of crash damage. The innovative rear end cap allows straightforward installation of tuning tip inserts or a spark arrestor, making this muffler adaptable for different riding conditions and performance requirements. The slip-on design is intended for convenient installation using the motorcycle’s compatible mounting points and existing exhaust system components.
This FMF Factory 4.1 Mini exhaust fits 2008 Kawasaki KLX140 models, 2009 Kawasaki KLX140 models, 2011 through 2017 Kawasaki KLX140 models, and the 2008 Kawasaki KLX140L. Verify the motorcycle model and year before ordering to confirm fitment. The product features a stainless steel and aluminum muffler construction with a titanium Megabomb included, offering a durable, performance-focused replacement for the original exhaust components.
Features:
- Resonance Chamber Technology: Incorporates FMF’s latest design technology for refined exhaust performance.
- Patented Core Shape: Helps reduce sound levels while maintaining maximum power output.
- Patented Canister Shape: Increases internal volume for additional sound-absorbing material.
- Patented Chamber Design: Enhances and refines exhaust pressure for optimized performance.
- Factory Forward Engineering: Centralizes mass and helps reduce potential crash damage.
- Application-Specific Tuning: Uses optimized core specifications for the Kawasaki KLX140 application.
- Rear End Cap: Supports simple installation of tuning tip inserts or a compatible spark arrestor.
- Titanium Megabomb Included: Helps optimize power output for compatible motorcycles.
- Fitment: Fits 2008 Kawasaki KLX140, 2009 Kawasaki KLX140, 2011–2017 Kawasaki KLX140, and 2008 Kawasaki KLX140L.
- Brand and Part Number: FMF manufacturer part number 042382; vendor part number 79-42382.
Fitment:
2008 Kawasaki KLX140
2008 Kawasaki KLX140L
2009 Kawasaki KLX140
2009 Kawasaki KLX140L
2010 Kawasaki KLX140
2010 Kawasaki KLX140L
2011 Kawasaki KLX140
2011 Kawasaki KLX140L
2012 Kawasaki KLX140
2012 Kawasaki KLX140L
2013 Kawasaki KLX140
2013 Kawasaki KLX140L
2014 Kawasaki KLX140
2014 Kawasaki KLX140L
2015 Kawasaki KLX140
2015 Kawasaki KLX140L
2016 Kawasaki KLX140
2016 Kawasaki KLX140L
2017 Kawasaki KLX140
2017 Kawasaki KLX140G
2017 Kawasaki KLX140L
2018 Kawasaki KLX140
2018 Kawasaki KLX140G
2018 Kawasaki KLX140L
2019 Kawasaki KLX140
2019 Kawasaki KLX140G
2019 Kawasaki KLX140L
2020 Kawasaki KLX140
2020 Kawasaki KLX140G
2020 Kawasaki KLX140L
2021 Kawasaki KLX140G
2021 Kawasaki KLX140L
2021 Kawasaki KLX140R
2021 Kawasaki KLX140R F
2021 Kawasaki KLX140R L
2022 Kawasaki KLX140L
2022 Kawasaki KLX140R
2022 Kawasaki KLX140R F
2022 Kawasaki KLX140R L
2023 Kawasaki KLX140L
2023 Kawasaki KLX140R
2023 Kawasaki KLX140R F
2023 Kawasaki KLX140R L
2024 Kawasaki KLX140L
2024 Kawasaki KLX140R
2024 Kawasaki KLX140R F
2024 Kawasaki KLX140R L
2025 Kawasaki KLX140L
2025 Kawasaki KLX140R
2025 Kawasaki KLX140R F
2025 Kawasaki KLX140R L
2026 Kawasaki KLX140L
2026 Kawasaki KLX140R