FMF 4.1 Slip on (2023 Yamaha YZ450F)

I will say this right now… There is nothing wrong with the stock system that comes on the 2023 YZ450F. The headpipe and mid pipe are different than the 2022 machine so FMF went to work and built a system that helps that mid range hit that the 23 YZ450F has. Unlike last year, where … Continue reading FMF 4.1 Slip on (2023 Yamaha YZ450F)