A video would help. But based on common errors, here's my guess:
You need to hit a strong cast-loading shape at the end of the kip; that is, both the feet and shoulders should be in front of the bar as far as you can get them. (My unpopular opinion is that the elbows should be slightly bent for this, but I am solidly in the minority on that)
As for what you need to do to hit this shape, again it's hard to say without a video, but a common issue is initiating the kip too early, before the glide has hit full extension. Later initiation of the kip will give you more power coming up, helping you hit that shape faster and easier.