I have about 6 rides on my Rekluse with the tusk clutch plates. I figure my rides average 2-3 hours, so I have about 12 to 18 hours on the clutch. After the install of the Rekluse, I did the 20 minute break-in and had to add another .055" Rekluse metal clutch disk (for a total of 3 disks to get it within the .030" to .042" install gap). I set the gap closer to .030". I also istalled the softe spring at the clutch perch because I do single track more than motocross as per Rekluse recommendations. Everything worked great and I love the clutch. However, when I changed my oil, I noticed a lot of debri in the filter. This bike ('99 yz 400) always has a clean filter. After the last oil change (I change after every 3 rides), I decided to look at the install gap and it was past the .042" tolerance. Taking the clutch apart, I noticed the metal plates are blue'd and the clutch disks are below the thickness spec per Yamaha. The spec is around .115" to .121" for disk two and I measure my disks to typically be around .109". I measured .119" for the leftover new Tusk clutch disk I had from the install. I have the external perch adjuster and believe I set the Engagement point correctly (.5" at the end of the clutch lever at 4500 rpm), but I didn't have a tachometer, so I guestimated the rpm, this might be my problem. I've got a tachometer/hour meter on order, so I should be able to do it right next time. My riding style is to surf the torque curve, meaning I don't rev it hard, I usually ride a gear up. On single track, I'm usually in 2nd or 3rd. 1st is too slow for me. I've been riding for over 25 years and usually one of the fastest ones in my group when I ride single track (unless I'm riding with my old riding Cal Poly Penguins riding buddies, then it's a free for all...). Not bragging, just trying to give info. My question: 1) Anybody experience excessive wear on the clutch disks with a Rekluse clutch? 1) Has anybody else had a problem the the Rekluse with a non-stock clutch? 2) Should I try a Barnette clutch, or go with stock?