I can tell you first hand that a simple secondary clutch adjustment turns the Z8 into something completely different. In fact, I dare say it will give a RZR 900 a run for it's money. Might not beat it...but it won't be far apart.
I agree. I was told by CFMoto that they purposely under power their units for engine life and durability.
I am currently in the process of rebuilding the motor in my blown Z8. My plan, if it will work, is use the HiSun 800 connecting rods instead of the CFMoto ones. The reason why is, the HiSun connecting rods are identical to the BRP ones, which means I can use BRP pistons. This also means, I can punch it out 2mm over, and make it an 842cc AND if I'm feeling frisky, I can go with the 2mm over & high compression pistons. I was able to purchase an entire brand new HiSun crank assembly cheaper than I could buying two BRP connecting rods, and I would still need bearings.
I'm looking into POSSIBLY going the air dam route for clutching, or I may just use the Dr Pulley 24g sliders and settings you have recommended.