Ran my b5m last weekend , rm arms on the rear , 1.6 all round 27.5 32.5 oils everything else b9x stock us8ng a trackstar 17.5 , the car is beast got second overall to a serious stock racer pucks ti screws ect , would love to go all out on this car but with the ft lite just around the corner would be a waste , either that or the yz2 which looks an awesome car at our track !!!