2001. The tenth character of the VIN is the year of manufacture.
Js1rj18c
1992
Sounds like an engine number. A vin is a 17 digit number you will find on your head tube.
2001 Look for yourself here: http://www.suzukicycles.org/_misc/identification.shtml
You can find the VIN number on the frame at the steering head.
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.
Hi, RJ15A tells you that the bike was build in between 1989 and 1995. Regards Kicking-Wolf
2000 according to that number
1986
1976
1987 88 89 only