Rekluse Versus KTM head to head build comparison: There are some interesting differences between these clutch packs in regards to the number of plates, materials used, the spring rates of the clutch springs, and total weight. I'll be offering up a few personal theories regarding the differences and how they may affect performance. I'm keen to hear others opinions and theories as well! The KTM OEM clutch pack uses 8 friction disks with an aluminum base and steel drive plates. The Rekluse uses thinner plates and has 11 friction disks of which 8 of them have a steel base and 3 with an aluminum base. The three aluminum friction disks took me by surprise. One of the reasons I wanted to try this clutch was I was under the (incorrect) impression it used steel plates throughout. However the plates are positioned at the front and back of the pack where heat build up tends to be less. KTM clutch plates Rekluse clutch plates Drive plate differences: The KTM drive plates have a dimpled surface. The ReKluse plates are smooth. I'm uncertain if there is any practical difference between the surfaces. I suspect the KTM plates may retain a bit more oil? But whether that in fact happens and if so is good or bad I couldn't say. Clutch pack weights: There's been some speculation as to what the weight differences would be between the clutch packs. I didn't have access to a precision scale so a postal scale that measures in .1 lb increments had to suffice. The OEM clutch pack weight vacillated between 1.5 & 1.6 lbs on my scale. The Rekluse wieghed in at 2.0lbs. That makes the Rekluse between 6 to 8 ounces heavier based on my scale. In my book that's a plus! A bit of additional flywheel affect on this motor for my use will not be a bad thing. Clutch pack springs: I took the clutch springs to a local machine shop to test the springs. Measurements were taken using 1.25" (32mm) as the installed spring height. All 3 springs were tested form each clutch pack and the results were very consistent from one spring to the next within each set. ReKluse / KTM The Rekluse springs each measured a consistent 37 lbs at 1.25" The KTM OEM springs each measured a consistent 46 lbs at 1.25" Woah... I was not expecting that! That's a huge difference and I'm a puzzled ReKluse opted to use a LIGHTER spring rate. I have to believe they did so with good reason. My theory is this: Since the PASC system uses the opposing ramps between the inner hub and pressure plate as the primary means to achieve clutch lock up the need for a stiff clutch spring to handle acceleration loads is negated. The lighter springs should make the slipper function occur under lighter deceleration loads which ReKluse may have deemed an advantage. Keep in mind the Rekluse is also designed for the 790 Duke and it may have been track use they were considering when they chose spring rates. Bottom Line: I'm going to email them and ask! :) Clutch pack thickness: The OEM pack measured 36.42mm The Rekluse measured 36.68 The repair manual calls for 35.60 - 36.50 with a wear limit of 34.8mm. The ReKluse measured a hair over spec, but not so much that I will worry about it. So there you have it. The side by side of the two clutch packs. I hope folks find it informative if not also a bit puzzling. I will be installing the Rekluse in a the next day or two and look forward to seeing how it feels.