Engine number and year of manufacture
Every once in a while we get a post asking if you can tell the model year of an engine from the engine number. Well, Kawasaki doesn't give out this information, as it would allow people to figure out their sales figures, which are confidential. However, one can observe and write stuff down. This is an unofficial list put together from experience and physically verified by AP.
There’s no guarantee that this list is 100% accurate, but these are pretty solid numbers, obtained by comparing VIN and engine numbers. The engine numbers are sequential, so there is a start and end range. Keep in mind that the engine number only dates the case, since the other parts could have been changed. But this is usually very unlikely.
There are casting marks on various parts of the engine that give the year they were made. The head and valve cover have these markings, and the engine case halves do, too. The complete engine number is just in one place: the rear right side of the crankcase, above the grounding bolt.
There is a little start and end data missing here, but that should only put some of the list off by one model year for those years in which little information is available (early 1987, 1989, 1997, and 2000).
The same engine was used in these bikes:
The question marks on the end of the numbers are the sequential numbers that give the exact engine number. Since the same engine was used for years, the exact digit in this part of the engine number isn’t critical.
2004 EX250EEA00001 Start of assembly in Thailand
2008 EX250JE000001 Carb
2012 EX250JEA95??? and continues through EX250JEAA????
Here are some engine numbers and the decoded year of manufacture.
EX250EEA22821 = 2006
EX250EEA15699 = 2005
EX250EE168247 = 2001