FMF Factory 4.1 exhaust silencer — Kawasaki KLX 140 2008–2020 and others (4T)

The FMF Factory 4.1 is a four-stroke silencer focused on power across the range and on the lowest possible weight — it's among the lightest mufflers available. Factory Forward Engineering centralises mass and improves handling. It can be fitted with performance tuning inserts and a spark arrestor module. Fits: Kawasaki KLX 140 (2008–2020); Kawasaki KLX 140 L (2008–2020); Kawasaki KLX 140 R (2021–2026); Kawasaki KLX 140 R F (2021–2026); Kawasaki KLX 140 R L (2021–2026); Kawasaki KLX 140 G (2017–2020). Specifications — muffler material: Aluminum, end cap material: Stainless Steel. Note: does not meet the 2025 FIM sound limit — intended for practice and closed courses, not for FIM-sanctioned racing. Delivery 5–8 working days. SKU: 042382.