got them down in the 1.61-1.64 range , still needs to come down some but I know its there, the bikes working good, and soon when that 200 shinko is worn I will cut down to the 190 at least or find a lighter tire in a 190. this bike just took some getting used to, my 600's and liter bikes just never had the torque like this thing, and thats I believe where the difference in launching is, thats why I was frustrated b/c my other bikes were never a problem, but anyway I'm getting there I think its got 9.50's in it....Oh and that came by putting the stock 40t on the rear, helped me out