I didn't need to replace my old ones, but I do it every season anyway for peace of mind. Basically, that means I change them every 50 hours or so and I believe they could go A LOT longer. Install is easy, and no screws!
WOW!!!! Turned my 2018 KTM 150 into a different machine. Power and woke right up! I prolly didn’t need to replace my factory reeds but since I installed the Lectron carb I figured I’d put in some new upgraded reeds.