Well you have to learn throttle control and the balance point will help you in learning to ride a wheelie on a bike. If you’re ready to learn then 1. Make sure the rear brake works and adjust the lever to a comfortable height. 2. There should be 1in. of play in chain slack. A chain too tight or too loose will wear out the chain and sprockets faster than normal. 3. Make sure there are no cracks in the foot pegs, and make sure all of the bolts are tight. Normal stuff before you ride just check the bike over. Now that you have checked the bike over have some throttle control and know where your balance point is on a sit down wheelie, its time to stand up.
I recommend clutch wheelies, Close the throttle, and then pull the clutch in all the way, with one finger. Then twist the throttle and dump the clutch.
When learning to clutch, only rev up the engine a little bit at first before letting out the clutch. This will give you the feel for clutching. Then gradually increase the rpm’s before dumping the clutch, until the front end jumps up close to the balance point. Reduce the throttle as the front end comes up to the balance point. If it comes up too far, gently push the rear brake to bring the bike back forward. When clutching second and third gear wheelies, the bike may need extra help, depending on what bike it is. If clutching alone doesn’t get the wheelie up, then bounce at the same time. This is done by pushing down on the bike (with your arms and legs) at the same time you open the throttle, and then leaning back slightly when dropping the clutch. I is not a good idea to pull on the bars. Pulling up on the bars may cause the wheelie to come up funny and wobble.
Last but not least Practice Practice Practice