I just finished rebuilding my 2400kv motor with my 5mm Shaft repair kit that came in the mail today. The motor seems to be running perfectly fine. I am running 19/52 Hot Racing Steel Pinion(Just installed today) and Spur along with a FLM Center Diff. I went out today to get some speed runs with my 3s 5000mah lipo and my top speed was only 37Mph! I was surprised since others are averaging about 50Mph with the same gearing. I have MIP's all around, Can it be the weight? My battery was fully charged. My tires were not ballooning. Can it be from going from a 3.2mm shaft to a 5mm? My bearings are clean, but havent checked my diffs for a long time. Does my new Steel pinion need to be broken in? Let me know what you guys think. Thanks!