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I know she is getting enough fuel.....carb bowl always full. Not a pump issue

Roketa 250cc with 257cc motor. After getting her valves adjusted....she ran ok for about a day, but since I was moving....hadn't run her in about two weeks. Before the move.....I tried starting her up a few times, but it sure took a while to get her going. Then after the enrichner cut off.....anytime I gave it gas,....she would die. Thought this may be an issue with clogged jet, so I took out the carb and gave everything a thorough cleaning!! Put her back in this morning, and the same thing happened.....tough to get her started, and the minute the enrich near cuts off, she can't stay running. Tried the mixture screw,....and even tried to get her to idle high again, but no go. Could this just be a bad carb? Or a CDI issue? Starting from cold, she needs a little throttle and help to get started, then runs until the enrich near cuts off. Giving gas after that,....she just bogs down. Mixture screw is at 2 1/2 turns out. Had it to four, and then to 2...... Same thing. What is going on?

I called the guy who did the valves, he isn't a scam artist, and he said to buy a new carb. If she was running ok when I got her after the valve adjustment, what could have changed? Thanks all!!

Ok,...so here is the update for someone who may read this later to get answers for their own situation: I agree that it could have been a valve issue. I was tired of dealing with the plastics and all, so I outsourced the work to a dealer out here. He fixed a small vacuum leak, and adjusted the valves. He said it was still cutting out after a long run at high rpm's due to not having vacuum to the accelerator pump. Also doesn't start without at least a few cranks of the starter (so can't use remote start). Suggested new carb. I told him to button it up and I'll just use her like that for now. Any thoughts on this?

Back to square one everyone!! Can't believe this.....I must be loosing my touch on diagnosing this stuff. Used to be on point when I worked at the shop.....but years down the line now......I'm stumped! She cut out on me three times today. The first time made me think fuel pump because it took me opening the throttle halfway while cranking to get her to start sputtering. Made me feel like fuel pump wasn't delivering enough fuel to the bowl. She quit while I was letting go of the throttle after a 60mph run for about a mile. As I gave her gas again, I could feel her sputtering, then just quit.

The second and third time just happened tonight, both as I came to a stop at a light. Still took cranking with some throttle open to get her to sputter (indicating that fuel is starting to get to the bowl). What's going on here? I know it sounds like valves, but the previous owner said he adjusted them (I know, I know.....why trust his word). I just think that if it were the valves, I wouldn't have to crank her a few times with the throttle open, just to start her. She eventually does start just fine, but why cutting out?

I'm now running sea foam in this tank. I do have a slight issue starting her full cold, where I have to repeat my open throttle routine, but tonight,...she started via remote....so go figure. Any ideas ya'll??

No need to result to name calling. You were the one touting how there are new students on here, of which I'm one. Let it go pal. I'm just here to get, and give friendly advice.

On a different note, I took my time....and stretched the spring. Was so worried about overdoing it, but the spring did seem pretty stout for what it was. Problem solved!!! Totally took away a lot of stress from this thing with a simple fix. Thanks to all again!!

Yup....spring and all. I'm just worried about stretching it and having something happen to it,...then not being able to find any other spring to replace it. I'll try my luck with a little stretch and see what happens. I'll update later and share what happens.