For the 175/200cc models, the frame number is stamped on the side of the headstock, and the engine
number on the transmission case. Both are of the form “TA1-30991”. Here, the last five numbers for
the incremental identification number, and the prefix is the factory model code. The “TA1” prefix was
used for 175cc machines, and “TA2” was used for 200cc machines. Please note, however, that the
very earliest BS200s were built using up the remaining factory stock of frames already stamped for
175cc models (175 and 200 frames are identical). These therefore would have had frame number
prefixes of “TA1” with very out-of-sequence identification numbers
you might have seen the guide already but here's the link again.
http://bridgestonemotorcycleparts.com/index.php?board=40.0here's the pic I said I was going to post.