Factory 4.1 RCT Exhaust Silencer 08-25 Kawasaki KLX 140 R G L F - FMF 042382

FMF Racing’s Factory 4.1 RCT Slip-On Muffler is engineered for performance and durability, delivering substantial power gains and reduced weight for Kawasaki KLX140 and its variants. Featuring FMF’s advanced Resonance Chamber Technology™, this system boasts shorter length for improved mass centralisation and enhanced crash resistance. Constructed using aerospace-grade aluminium and stainless steel, the 4.1 RCT is designed for professional riders seeking power and reliability, and is manufactured entirely in Southern California for uncompromising quality.

Features

• FMF Resonance Chamber Technology™ maximises power and throttle response


• Shortened overall length for crash resistance and optimised mass centralisation


• Aerospace-grade aluminium construction with carbon end cap provides strength and lightweight benefits


• Substantial power improvements across the entire RPM range


• Significant weight reduction compared to stock exhaust


• Rapid Tuning System (RTS) for quick adjustments


• Compatible with both FMF and OEM headers


• Screen-type spark arrestor included


• Quiet insert available separately


• Designed for closed course competition use only

Specifications

• Type: Slip-On


• Configuration: Single


• Main Construction: Aluminium


• End Cap: Stainless Steel


• Midpipe: Stainless Steel


• Finish: Natural


• Spark Arrestor: Screen Insert (included)


• Quiet Insert: Sold separately


• Weight: 3.6 lbs (1.63 kg)


• FMF Item ID: 042382

Vehicle Fitment

Kawasaki

• KLX140 (2008–2020)


• KLX140F (2021)


• KLX140G (2017–2020)


• KLX140L (2008–2021)


• KLX140R (2021–2025)


• KLX140R F (2022–2025)


• KLX140R L (2022–2025)