Well, finally got all my new clutch parts, total new wet clutch, clutch housing and new bearings and new primary dry clutch and rollers. Got it all installed and took it for test ride ,, first couple rides around the yard went good but now the belt is slipping and slips bad enough to start smoking. Wonder what the problem may be? Everything is new except the belt but it looked good.

Did you measure the width of the belt? It may be under spec.

Found the problem, the new seal in the case between the wet clutch and primary dry clutch failed and let oil into the dry clutch area. I noticed the seal fit kind of loose when I put it in. It wasn't a OEM CMoto seal.I bought it at Carquest when I  bought the new bearings , they told me it was the cross reference and was the exact same thing but a National seal brand. They are wrong. I will order the CMoto OEM part this time. Now I have a lot of cleaning to do, and order a new belt.

Got my new Cmoto seal yesterday and put it in along with a new Gates belt. Cleaned all the oil off of the pulleys with alcohol and buttoned her back up . Seems to run and pull pretty good. This is really the first time I have gotten to ride it much since I bought it 4 weeks ago. Had to order all of the parts it needed from China,, or pay a lot more for them here. Seems to go good but that clutch sure is noisy when it's idling. But everyone seems to have the same noise. Gonna take it out to the trails this week and give her a workout.

Is some belt smoke normal on these machines? I just got it all back together with a new belt and made sure all of the pulleys were wiped down with scotchbrite and alcohol, and everything was spotless clean. Today after riding it around the yard a few times in low range when I stopped there was smoke coming out of the belt housing , smelled like rubber smoke. I let it cool off and took it out again and same thing,, not a huge amount of smoke but smoke non the less. Will it do this until the belt is broken in or do I still have something wrong? It has about 60 minutes of run time on it so far. After all of the work and new parts I put on it I'm pretty disappointed. If it's normal then I won't worry about it. I was planning on taking it to some trails this weekend but I don't want to get stuck way out in the middle of nowhere with a buggy that won't get me back. Any idea's? 

[2015 Z Force 800 53/Trail EPS]

What machine? Regardless-Not normal. If a belt slips.. at all.. it burns and that leaves a glaze so..that belt is shot now. Better find out what's wrong. Check that the secondary is clocked correctly. Where it was slipping will be obvious on the clutches. BTW- alcohol is water based and will not take all the oil off the surfaces. Use acetone, lacquer thinner or brake parts cleaner. You may have toasted your belt because there was just a little oil left that you didn't see. If you will take acetone on a soft clean rag and wipe down the sides of the belt, then go over the sides with a scotchbrite pad..then one more time with the rag, you might be able to use that belt for a while. It must be oil and glaze free. 

CF800 EX, I
the wet clutch was fried when I got it and I replaced all of the wet clutch assembly, all of the primary sheaves, bearings and seal , then the seal blew out and coated everything with oil so I had to buy another seal (oem one this time) and a new Gates G3691  belt. It had a Gates 3659 belt on it when I got it. Anyway I have had this thing for over 2 months and every time I ride it around the yard something else happens to it. I didn't touch the clocking on the secondary clutch, I think it was set on B2 but can't remember.
I'll try the lacquer thinner , the reason I didn't use any brake cleaner is the belt instructions said not to use brake cleaner. Thanks, I'll take it apart again. 

The secondary clutch is set on the B1 position. That's the factory setting isn't it? There was oil in there again, the new seal isn't leaking so I'm not sure where it came from. Not a lot of oil , not like when the seal blew out but a little. The belt wasn't glazed at all , or oily. I am cleaning everything back up again with Lacquer Thinner and scotch briting all the sheaves. I'll put it back together and try it again. Wish me luck !!!

Found where the smoke was coming from. When the seal blew out it filled the belt housing exhaust tube that blows on the front cylinder exhaust with oil, after I cleaned out the belt housing when I replaced the seal I didn't think anything about that blower tube, today I was watching it run and it was blowing oil on the front cylinder exhaust pipe causing the smoke. I took the tube off and I bet there was 1/2 quart of oil in it. No more smoke now. I didn't think anything about that tube may have oil in it from the blown seal. Learned something.