My 01 YZ 426 has been making strange clutch noises lately. It has a Z Start Pro Rekluse clutch installed to all of the recommended engagement settings. When accelerating from a dead stop in first gear (without using the hand clutch lever) the clutch makes almost a deep groaning sound as engages if you accelerate moderate/hard. If you use the clutch lever in a traditional fashion or accelerate slowly the sound does not happen. anybody heard of this? I'll be calling the rekluse guys tomorrow, but I wanted to see what others had experienced.