Hmmm...why is a 137 a no go? Just curious as it's only 2 lugs more on the ground than a 129....the 4 strokes have better balance, and ride in the longer chassis.No, they have pulled it out of the short track and the 137 is a no go for the wife so the 4s is out. I would just like to know why and I’m not talking the 180hp version so not a power thing.