I have a yz450f with the z-start and I am using the external adjuster right now. I am planning on doing a my first motocross race on the 24th of April. I was wondering how people are doing on the starts without the perch adjuster which lets you use the clutch to get your RPM's up. I am afraid that I won't get as good of start without the clutch. After the start I will not need the perch adjuster anymore. I have only ridden in the woods so far and so no need for the clutch lever. I know the start is very important in a motocross race especially since there are a lot of people in my class that are at the same level as me as far as speed on the track. So it is important to do well on the start. I have the perch adjuster, but don't want to put it on.