That’s interesting. Not only due I not have the third bearing in the axle tight I do not even have it on the kart. Someone told me a while back to take the bolts out of that bearing so I did (no one else seems to run them bolted in) and they said it would free the kart up. Then it bothered me just rattling around and I was already heavy so I took it off completely. I imagine that this has the effect of stiffening the axle?