I see lots of posts in various sections about riders who have installed the Revloc Dynaring, and had good results. This prompted me to try one on my '08 KX450F. Long story short, I had to take it out. I Could not get it to work as advertised. I am not an amateur at wrenching, having worked on over 30 of my own motorcycles. I initially installed the device with the 'load springs' installed a-symmetrically. I corrected this problem, but still no luck. I tried all the suggestions from Revloc, and none of them worked: - extra supplied washer at the throwout bearing - 1.5mm gap in the clutch plates - less 'load springs' ( I went from 5 to 2 blue springs) - lighter load springs - Dyno oil - fresh clutch plate - stiffer clutch springs (did not do this. Seemed like desperation to me) No matter what I did, it would still slip under load. Unless the rpms were up around 6k, the clutch would slip, no matter how it was adjusted, unless it was adjusted out of the auto range. It also never would completely "un-adjust' back to a stock clutch, as advertised (it would not disengage enough to be a useable clutch). And getting a hold of anyone at Revloc was not easy. They do not return their phone calls or emails (5 of each) and I just had to keep calling and calling until I got a person. Bogus....! So, I got a Rekluse EXP instead! The new EXP 2.0 system. Same price as the Revloc. Installed it in 20 minutes, and it rocks. Hooks up like you would want it to, and just slips a little if you are in way to high of a gear, or if you are at idle, it disengages. It works just like you had an invisible man professionally feathering the clutch for maximum traction all the time. You can still fan the clutch like stock when needed. This made me wonder: "maybe the KX clutch was just too wimpy, or maybe I really did do something wrong.....". So, I ordered new steel plates (you have to use their plates in the Dynaring) for my Honda CRF450X, and installed the Dynaring in there. I followed the instructions to the letter, and tried all the 'tuning tips' they gave me the last time, and guess what: IT STILL SLIPS! The clutch only stays engaged if the motor is around 6rpm. Below that, it slips under normal loads. OK, so I'm convinced it's not something I am doing. It's just not heavy duty enough for my needs I guess, or it's defective, or it's just a bad product. I thought you should know. Oh, and they never did return any of my emails or phone messages.