My research findings:
This is what I found out when I looked up the VIN# JH3TB050XDC268514
First the VIN# should be broken down into segments.
First JH3 - Gives the manufacture location (Japan)
Second - TB050 is the serial number
Third -X- is the check digit. Don't what it's use is
Fourth -D- is the year D=1983 B=81/C=82/D=83 and so on
Fifth -C- is the manufacture city Saitama (Japan)
Last -268514- Is the production number.
So about the only thing I can deduce out of this is that it's a Honda trike built in 1983.. Have you looked at the top of the engine case just below the cylinder head for a "CC" stamp?
Hope this helps. And I will put up a link soon to the source I used to find
this out.
Ok here is another source for Honda VIN #'s.. The one I used was on a cd I got for my 81 ATC250r...
http://www.vsource.org/VFR-RVF_files/BVINs.htm
Chris (Reno,Nevada.)
67 Honda CT-90
75 Honda ST-90
81 Honda 250r
85 Honda 250es BigRed
99 Honda XR250R
04 Honda CRF150F - Cousins Ride