I have found on 300ft on dirt once the track changes so does rider position and wheelie bar height, right after the track is groomed It is loose and i do better sitting back further on my seat with a lower bar but soon as its tor up with mounds of dirt and start line and down to hard pack i scoot forward on seat and raise bar 1 inch, there are a lot of variables to this, the rear shock being stiffer helps to control the weight transfer better I feel. winning is not always about being fast a couple times but being consistent and keeping track of what you did and how it help or made it worse will help with any racing. if you go and change 3 things at a time you'll be chasing tail all day