F3 weird problem

Ok so I think this maybe the cct but I dont know. Here is some of the problems after like 7 grand the bikes makes alot of noise and really does not want to pull vary hard. It almost feels like something is draging on the bike but when I pull the cluth in the hole bikes rolls good no rubs or anything. The bike has 25K on it and really when its not under load the bike free revs with know more noise then the day I got it just under load its gets really winy. The only thing i can really think of is timing with the cct any in put would be nice. thanks guys.

It doesn't sound like a CCT.   When a CCT is going bad, there is a noise that sounds like a marble bouncing around in the valves at idle or lower rpms when the engine is cold.  Once the engine warms up, there isn't too much noise.  Maybe the timing of the bike is off?

have ya tried some carb cleaner in the tank?

The sprocket and chain are new and in good shape. Its in all gears it just will not pull after 7k and the noise is way more then ever before. Like I said its like a brake is stuck on but I have looked at all of that to make sure its all rolloing free. As for the cct it may make some noise at low rpms but not at idle could it have just sliped and timing is off a little? Also I have not tryed any cleaners.