03 Polaris Predator 90 - clutch, rollers, spring? help!

First time joining a forum, I usually just read them, but I've hit a wall. To sum it up, I'm a momma to a rough riding 7 year old boy. I do all of his quad and dirtbike maintenance. Might take me longer than a shop, but I figure it out and get it done. Anyways, The other day he was riding hard and he hit a big size hole. The quad stopped moving forward as he was pushing throttle. The quad didn't die, it just wouldn't move. He turned it off, back on, and pushed throttle, and it moved. He came up to the house (he knows momma's rule - when you hear or feel something off, bring the quad to me asap) He told me what happened and I thought throttle cable at first. Checked it and chain, they were both fine. I had him do a test ride in front of me, and he goes about 20 seconds up the driveway and then it stopped responding to the throttle again (example of issue is almost like when driving a manual car and you pop it into neutral while rolling and revv it up) I'm on day 3 of tearing into this quad and still unsure. I have CVT cover off, and access to the clutches and belt. The belt is tight, (as I assume it should be) I hit the start button and can hear a little bit of clinging but, it starts (i'm thinking the little slider pins may have broke off, but I don't think that has anything to do with movement of the quad. Just another issue I'll get too once I know the dang thing will move) The clutch near the rear (I think this is called the secondary) I can turn with a little bit of force and see that it moves the chain. I have read about rollers, and a torque spring. I found rollers on the diagram, but nothing is labeled torque spring. I see 1) seat spring, 2) spring compression and 3) spring weight clutch\. All 3 are located in the secondary clutch. If someone can please tell me what spring I need to replace, I would appreciate it. Also, as for rollers.. wow what a mess! I have yet to get confirmation of stock 90cc roller weight. I read somewhere they are 3grams each. But like I said, I read that only once. The diagram shows 6 rollers, total. There is nothing added to the quad. Everything is bone stock. I read a forum that said 90cc's should have 30-48 grams of total roller weight. Well, that's 5grams - 8grams per roller. That seems like a big difference. And if 3grams really is stock weight, why is someone recommending 5grams - 8grams?

I got off track a little bit - are the recommendations to change rollers and whatever torque spring going to fix the issue? If anyone has alternative ideas or some sort of testing that I can do, please let me know.