Your forks don't have enough oil in them. Common problem. See here: https://tw200forum.com/forum/technica...hanging-2.html
Start on post #13.
After you have read all the way through, ignore all of it except for the 130mm oil level. Fix that and ride if for a while. If you are like me and around 180 to 200, that's all you need to do. I did all the rest and still ended up at the 130 mm level.
In the dirt, 12 to 14 makes for a better ride, but only good for short distances on the highway. It drops gas mileage about 10 to 15 mpg on pavement.