Small PENTON decals, white in color with the name and motor size on the upper front sides of the gas tank with the lettering being either straight or angeled. Sachs 125cc motor with a 5 speed called the "Six Day" Green in color on the air box, the rear shock body and the gas tank.Īll gas tanks were 2.5 gallon and made out of steel. Sachs 100cc motor with a 5 speed called the "Berkshire" Red in color on the air box, the rear shock body and the gas tank.
51 means 125cc & 52 means 175cc & 54 means 250cc & 55 means 400cc.įirst Year 1968 starting with serial number V001 Once again the last five numbers are the serial number. The first number is the model year and the next two numbers tell the size of the motor. But always remember the last five numbers are the serial number.Įngine Numbers: The engine case has the number stamped on it on the ignition side. They started with 550 for the MC5 model and 701 for the GS6 model. The 1976 - 1977 PENTON MC5 model and the 1977 GS6 model used something different. Some even had a 7 or 51 or 54 ahead of all the other numbers. The 2 meaning 1972 and the 02 meaning the second month, February. The first three is a code for the date it was made. Thank You.įrame Numbers: 1972 through 1977 all have eight numbers on the steering head. My good friend who has been collecting PENTON bikes for years helped me with this information. So if you see something listed here that is not correct, please e-mail me. I want to help PENTON owners get information that has been gathered and saved over the years from many PENTON owners.