i have my rcs 1.4 on a funtana now and i swapped out this off the DP bipe. the bipe was 13 lbs and the funtana is 11 1/4 so more power is what i am seeing. i do not have 5 gallons on the motor yet so i may have to wait and see as time goes on. the 1.4 uses so little gas that 5 gallons is going to take a little while. I get the black dots ont he bottom pretty bad so i suppose its still breaking in.