I received my new Rekluse core EXP 2.0 last week for my 2009 YZ450F. I'm coming back to 4 strokes after riding KTM 2 strokes for 5 years and will not ride anything without a Rekluse. I'm a 40+ slow A / fast B rider who spends most of my time racing Hare Scrambles and Enduros. After 1 ride, I can tell you I'm completely impressed with the new Rekluse Core EXP 2.0 and wanted to provide some installation tips and my first ride report. Start by adjusting the clutch perch to the stiffest setting then backing off approx. 8 turns on the adjuster. Next put the bike in 5th gear. Lay the bike on it's side and remove the clutch cover. Remove the stock pressure plate, and all steel and fiber disks. You can save the stock pressure plate, springs / bolts, and steel plates if you need to change back to stock. You will use 7 of the 8 fibers, the stock throw out with ball bearing; place those to the side for use later. Next bend down the metal tabs that hold the nut in place for the stock inner clutch basket and remove the nut (I used an impact gun for ease) and the stock inner clutch basket. You will not use the stock inner clutch basket; however, you do need the spacer/washer on the back of the inner basket. Place the stock spacer on the transmission shaft followed by the Rekluse inner clutch basket. The Rekluse inner basket was a tight fit so I used a piece of wood and lightly tapped with a rubber mallet to ensure it was in place. Next use the Rekluse metal tab and new nut and torque to specs (I had a buddy hold the brake pedal and placed a large screw driver thru one of the inner sprocket holes, since I don't have a clutch basket holder). Follow the Rekluse directions for the order of the steels and fibers, but the short version is thin Rekluse steel on the bottom, followed by alternating stock fiber and thick Rekluse steel plates. You should end with 8 Rekluse steel plates and 7 stock fibers. The next piece is the EXP expanding friction disk (be sure to read the Rekluse manual to see how you want your disk set-up, I went with the hardest engagement setting = 6 red springs). Place the expanding disk on top of the clutch pack; the bottom teeth should fit into the clutch basket and the top teeth should be just above the basket. Next place the stock throw out with ball bearing in the center of the assembly. Now you can put the Rekluse pressure plate (with the appropriate metal spacer) on the top of the expanding friction disk and use the supplied Rekluse clutch springs with sleeves and allen bolts - torque IAW the directions. Somewhere in the directions around this step it asked to check the clutch lever for free play. I had a ton of free play and had a brief panic attack that I had done something wrong, but my conclusion is that the large amount of free play is normal at this point. Now is where the magic happens; the center adjuster on the Rekluse pressure plate is what makes the magic happen. Insert your 5mm allen wrench as shown with the long end in one of the 2 adjuster holes and turn clockwise until you can no longer turn the wrench with "normal" pressure. This places the bottom of the adjuster against the center clutch basket nut. Then place the short end of the allen wrench into one of the adjuster holes and turn one complete turn using the tick marks as a reference. Now use the 4mm "set screws" to hold the center clutch adjuster in place. Place the Rekluse clutch cover in place and follow the break-in procedures. Once done with the break-in (and your wife yelling at you for making noise in the neighborhood); place the bike back in 5th gear and lay the bike on it's side. Ensure you have some free play in the clutch lever. Take off the clutch cover and allow the bike to cool down for 20 minutes. Loosen the 4mm set screws and turn the center clutch adjuster counter-clockwise to reset the starting point. Now using the previous procedures turn the center adjuster clockwise to find the base point, then turn the one full turn from the base point. From this position read the Rekluse recommended settings for how you want the clutch to operate; I choose the 1 full turn + 2 tick marks. Reinstall the clutch cover and go ride.