Trying to figure the weight and balance for a K3 with the 13gal. rt. wing tank. I also have the round aluminum header tank behind the seat. Don't know what the ARM is in inches for the fuel tanks so I can do the calculations. I know its not the same as the K4 or earlier models with the dash tank. Can anyone help me with these numbers. I found an old thread that had a picture of all the data but could not read any of the numbers. Thanks