I know this does not answer your question. But I have one on order for my 450. I have been on the fence about this for years. Auto clutch - I aint riding no Honda mini 50
. But last summer I hooked up with 3 guys riding the San Juan's. We were at a big rock climb and I watched one of the guys take a bad line : hit two near stops and manage to walk up. At the top I asked how the heck he pulled it off
Auto Clutch. All 3 guys had them. At that time I was looking into a Dyna ring. One of the guys had one and happened to know the manufacturer, this is what he told me ( I cant swear it was accurate-just what he said) " Dyna ring is no longer being made, Rekluse filed suit because they had the rights to it" thus it is the EXP. This is supposed to be the cats meow for less then the z-start ? Best part is, its tunable with simple adjusters. I am kinda excited to try it !