Since we are on the subject of cams, I got a tip from someone in Sweden to try a KTM 400 cam in my 380. we had to cut off the shaft that goes to the water pump on the ktm to make it work. the lower part of the power is strong and responsive, much like the 450, without the midrange hit, very nice. the only thing bad is the fuel milage, before with the stock cam I could go 40 miles or so, last weekend I ran out at 29 miles. Could it be the cam? or am I running more on the main jet? mj 172, needle jet R and pilot 42.