I'll check the joints but think they are pretty tight ... also have a tin sounding rattle like muffler shield but haven't found it yet ... put new sliders in clutch but didn't help .... work in progress ...

Scotch Brite the sheaves .. cleaned with brake cleaner ... wash the belt in dawn dish soap ... it has helped with the grabby take off .. machine still has to much vibration through the whole machine ... would like to ride another to see how it acts ... may just be the nature of the machine..
I'll try and attach video of running clutches.

A little belt/cord irregularity but I don't think that would do it. Spin the clutches by hand and watch for any run-out or warp-age or any strange spots on the sheaves.

I'll check it out and put it back together tomorrow and leave the cover off for awhile  ... haven't done much but clean up the sheaves ... everything looks good tho. ... Thanks for the help ... I'll update tomorrow and video if I can figure out how to post it.

While you down there inspect the motor mounts and the rear gearcase mounts tor movement and loose bolts. See if the engine looks to be not centered in the rubber mounts too as some have had the rubbers knocked out. Both would give you that metal-to-metal feel and sound. A bad u-joint on the front driveline would also give you vibration as it turns all the time.

I will check those items also .... ill try and post a couple pics of the belt ... both sides may have a glazed spot .. I eally don't know what to look for on the belt ... hope it shows up in pic ... I need a spare anyway ... it was doing it when I bought it but I thought a little vibration might be normal 😢 ... it runs smoth down the road after it gets past take off ... but ... it will hardly ever see the road at our house.

If you didn't change the belt when you did the kit that may be the issue

Make sure it's all torqued properly
As well

You should take a scotch brite to the faces an give them a buff if there's any glazing it can make the belt skip on take off

If your more aggressive when you take off does it do the same thing
Or only when trying to take off smoothly

I'm going to play with it today ... I didn't scotch brite the faces but will today and clean with alcohol .... it just does it taking off easy .. no problem when you floor it ... I bought the clutch kit hoping to make a better yard/farm machine and grandboys will want to drive it i'm sure (12-14) ... I surely appreciate the help

Pull the clutches an give them a good cleaning an inspection
Likely a new belt it in order

Was anything done Reclocking clutch weights etc that you know of?

I put a RNG primary kit in it but was doing it before that ... No work to secondary that I know of ... Never being around the CF Moto before I assumed it was nature of the beast .. but ... after thinking about it, I see no reason for it to be any worse than any other system.
I did blow out clutches the best I could while apart ... I believe it is getting worse ... so its probably belt vibration? I'll pull the cover and look .. Pretty sure it doesn't do it on the stands .. just under load.

I bought a used 22 uforce 1000 with 1200 miles .... it has a bad vibration when first taking off ... sounds like engine has no motor mounts and mounted metal to metal .. seems to smooth out after it gets going ...
Is the belt bad or possible clutch issue or nature of the beast?

https://fb.watch/nnijKAAt1E/?mibextid=NnVzG8

Welcome!  You're not the only 73 year old youngster here - I'm right there with you.

To late to grow up now bud

Heck whatever works. Older ones like mine with the cable throttle were also too light on the spring but it was just a matter of giving the peddle spring another wind. These new ones have that inside the module. Maybe it can be taken apart and.."Adjusted".   I hear...they fixed that issue in the 2023s with an updated throttle module. Wonder if they actually did and if it would fit the 22s...Hmm.

According to RNG the 23's are better but not cured ... I did read about stretching or adding a heavier spring but they didn't think the plastic housing would stand it very long.
I appreciate the quick response

New guy here with a 22 uforce 1000 ... im liking everything about it so far except the jerky throttle ... ive searched and read all the threads I could find on the subject with no real answer ... I have installed the RNG primary clutch kit which helped but still touchy ... it needs a stiffer peddle so it's not so easy to move is my thoughts ... any help would be much appreciated  .... right now I have a piece of high density foam under the peddle and it works great ... would prefer a real fix ... its OK to laugh 😃

Looking forward to learning about my 22 uforce ... located in north central mo and possibly one of the oldest at 73 ... thanks for letting me join.
Uforce 1000 2022