What year is this suzuki rm 250 -serial No rj17a103987?

Either this is a motor number, an incomplete VIN or a pre 81 RM. Write down the 17 digit VIN number on the head tube. Then enter it at the link below for motoverse.com

If it is the correct VIN, you will need to take it to your local Suzuki dealer to help you with the year of it.