If you decide to part that out I can use a few pieces!:laugh:
I am working (slowly) on an ST100 as well. Mine does have the serial number right where you are looking. Yours is looking good! I am hoping these are nice riding bikes.
With the myriad of people here that will be telling us what color these were originally, can you tell me if the blue is the original color? Mine was painted red over blue, but had purple as a base color. I may just do mine purple as "all Taco's are purple" ...right?
I will be keeping an eye on this...and will let you be the "guinea pig"! Good luck with your build. If I can help with anything, please let me know. I do have a drawing of the OG brake lever that I can email to you if needed. Another member here, LSCustoms, has an ST100 and may be fabbing some brake levers. I know he has been out of commission lately, but I am sure he'll be back at it soon. I will keep you in mind!