I had my Flo Motorsports clutch lever replaced under warranty for my 2012 Yamaha YZ250F. There was actually no manufacturing defect, the issue was completely due to my own stupidity.
Regardless, Flo Motorsports was great to work with. They responded quickly, made the warranty process easy, and got my replacement lever out to me without any hassle.
Great customer service and a company that stands behind its products. I really appreciate the way they handled everything!