I was told by M/T to put tubes in the slicks, I will next year. Trans brake, on a 2 step leaving at 2200 rpm, I have tried higher no difference. I have tried lowering the pressure not good results. I will up the pressure this weekend and try that.I believe the problem is what you say, big tire less air pressure, small tire more pressure. I have had the shock setting all over the place no difference. Thanks for all your advice. Will leave you know how it works out.