I ran into a huge problem with my wet clutch due to CFMOTO using substandard nuts on my 2020 ZForce 800.

The nut that holds the wet clutch on the crank shaft stripped...

I had to cut the original nut off carefully so that I didn't harm the crank shaft.

Unfortunately the stripped nut damaged the threads on the crank shaft.  I decided to file the end of the crank shaft down and then I ordered a 11/18 x 18 LH die, which is the next size smaller thread after the M18x150 original nut. I re-cut the threads on the crank shaft.  I then purchased an high quality 11/16 x 18 LH Jam Nut and I found a washer to go along with it that matched the size and weight of the original nut.

Due to the wet clutch wobbling around it ruined the 6208 bearing on the wet clutch bell housing.   I wasn't sure how to remove but the service manual said to press it out.
I pressed it out and I am currently waiting for the new bearing to arrive.

I did find the reason Carl Malone said it had transmission problems.  The Drive Bevel Gear is busted for the front wheel drive. 
I've already ordered a new part from Sun Coast Cycles and it should be here next week.

I wanted to post this because I'm fairly sure that I'm not the only person to have a problem with the substandard nuts that CFMOTO was using in 2020.
I did notice the new replacement nuts that I ordered from them was made to a higher quality.

[2015 Z Force 800 53/Trail EPS]

Glad you found and posted a solution. Most people would have to replace the crank..which means a full rebuild. Thanks for posting this. I'm sure it will help others.

I had a similar problem last year on my 2017 800.  The threads on the primary clutch shaft stripped when took the primary off to change the belt.  I had to replace the clutch shaft and housing. 

Those pics brought back memories.  Not a difficult job, but CFM definitely needs better metal.

 NMKawierider

I want to make sure I have this correct...
The Primary shaft has to spin freely counter-clockwise, if not I installed the one way bearing backwards?

https://cfmoto-forum.com/800ex800/cvtwet-clutch-issue/msg47215/#msg47215
"Just FYI, if it is in and working correctly, with the belt off or in neutral and engine NOT running, the primary will spin counter-clockwise and lock if you try and spin it clockwise. If in backward and there are no other issues..including a damaged oneway, it will be the reverse of that."

[2015 Z Force 800 53/Trail EPS]

NMKawierider

I want to make sure I have this correct...
The Primary shaft has to spin freely counter-clockwise, if not I installed the one way bearing backwards?

https://cfmoto-forum.com/800ex800/cvtwet-clutch-issue/msg47215/#msg47215
"Just FYI, if it is in and working correctly, with the belt off or in neutral and engine NOT running, the primary will spin counter-clockwise and lock if you try and spin it clockwise. If in backward and there are no other issues..including a damaged oneway, it will be the reverse of that."

Had to think about it for a second but.. yes. With it in gear and trying to gain speed down hill it will be trying to turn the primary and it's shaft faster then the engine as it tries to slow down. In order to use the engine it has to engage to the crankshaft as it spins clockwise faster then the crank shaft...so engage clockwise and spin free counter-clockwise.

Thanks!