Description
FMF Q4 Slip On Exhaust For KLR650
- Incorporates internal baffles, chambers and space age sound-absorbing materials to accelerate exhaust flow with less noise and minimal power loss
- Well under the 96db sound output on most machines to satisfy strict sound requirements
- U.S. Forestry approved Spark arrestor with maintenance free, stainless steel spark arrestor screen
Fits
Gen 1: 1984–2007 KLR650
Gen 2: 2008–2020 KLR650
Muffler Body Material: Aircraft-grade aluminum with a natural/raw finish
Midpipe & Endcap Material: High-strength stainless steel (conical endcap)
Weight: Approximately 5.7 lbs (significantly lighter than the bulky stock OEM muffler)
Sound Output: Max 96 dB (most applications run below 93 dB), utilizing internal chambers, baffles, and multistage packing
Spark Arrestor: Included (U.S. Forestry Service approved screen insert)
Header Compatibility: Fits with either the stock OEM header or an FMF header
Fueling: Adjusting the carb jetting (Gen 1) or using a fuel programmer/re-jetting (Gen 2) is recommended for peak performance, though not strictly required for basic operation.

