Engine Number help ?

[Nedlok]

Just started to rebuild my old 3 wheeler and am having issues telling if the engine is original. frame is a 1984 honda 200x but the engine is pull start i have not been able to identify the engine serial number it is TB05E-2519539 any help is appreciated thanks!

[350for350]

Well you've got an autox. There's a place on the cylinder where it shows the displacement. I know it's not much help, but it's a start. It's not the original since all 200x's were kick start. There's nothing wrong with an autox, it's really a popular home build. I've even started on one but got sidetracked by moving. I will for sure have it running by summertime!

[MonroeMike]

The engine is from a 1985 200s.

http://www.3wheelerworld.com/showthread.php/141286-Honda-Engine-Serial-Numbers