This subject came up several times recently, and has been asked about so many times that it's difficult to search for, due to the number of hits you get on the key words. I decided to re-post it and link it to Common Threads to make it easier to find in the future. Anyone who knows better please tell me if any of the information here is incorrect. Credit for the original post is not my own, but belongs to "cowboyona426". Read his original post also: http://www.thumpertalk.com/forum/showthread.php?t=83453 Basically, the '01 clutch mod for grabby and/or dragging 2000 YZ426 clutches involves nothing more complicated than the installation of the complete plate kit from an '01 model: 8 of 5JG-16325-00-00 PLATE, CLUTCH 2 (item 7) 8 of 3XK-16321-00-00 PLATE, FRICTION (item 8) 1 of JG-16321-00-00 PLATE, FRICTION (item 12) ** 1 of JG-16383-00-00 SPRING, CLUTCH BOSS (item 13) ** 1 of JG-16384-00-00 PLATE, SEAT (item 14) ** 1 of 93511-32027-00 BEARING, BALL (PUSH ROD ASSY.) 1 of 5JG-16356-00-00 ROD, PUSH 1 (short, outer) 1 of 5JG-16357-10-00 ROD, PUSH 2 (long, inner) ** These 3 three items are the key to the conversion. If your current clutch plates are really OK, you can reuse them, but you have to replace the first friction plate with the seat plate, #14. The boss spring is beveled, or conical, and the concave side faces outward on assembly. The push rods are needed to adjust for the slightly different stack height of the '01 plates. You can adjust the cable to cover it, but the later rod is a bit of an upgrade in any case. Another thing that improves the YZF clutch somewhat is an upgrade to a GYT-R or Hinson pressure plate. And, it should go without saying, the condition of the basket and boss will also affect how it engages and disengages.