I usually ride at a dirt track called burnt river. It's got mostly tables, a couple of doubles too. Doubles usually annoy me. Sometimes I rocket completely over them by too much speed and have a near dirt sample. Other times I'll undershoot it and I'll have to throw a seat bounce in midair to make sure I don't flip frontwards. I know full body positions for the track, sitting level and when to stand and how to keep the bike right, that's not the hard part for me. Neither is cornering. The issue is getting the right speed to land nicely. Tables I usually get 3/4 of the top. There's some jumps that are smaller which I have no issue with. But I feel like a goon when I only get a little over a metre of air when I see younger guys nearly clearing the table. Again it's only like my 5th time at a track. I've also had bad experiences at called Gopher Dunes. It's a sand track and the hardest one in Ontario. I would pin it in 4th gear all the way around and I overshot this tall hill and I reached a good height so I was feeling good. Next table top I tried had tons of ruts and I guess I didn't choose the right one because when I came down I came down hard. It was like 30° ( Really hot Fahrenheit) and I had to walk my bike off with a snapped front fender. If your pretty good everywhere else around the track and confident in your riding, but are just having trouble gauging speed for jumps there's some things you can do to help. When going to a new track I'll always do some slow sighting laps so I know what I'll be working with. Do a warm up at your own pace after that until you start getting comfortable with the soil and track layout. After that, take a break and watch everyone else riding. Look for someone that is hitting everything smoothly that's about the same skill level as you and hop on the track and do some laps following them. You can use them to gauge your speed for everything until you no longer need to pace someone for speed. Many guys at the track won't mind helping you out with pace if you just ask. If your not sure on how fast to go and your dealing with doubles or triples you should never just guess. Slow progression is better than no progression, any day of the week.