These are just so cool. That's all I know...
https://www.ebay.com/itm/1969-Yamaha-TR2-350/193333434254?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20160908105057%26meid%3Da3ec7fee8ae54732917a0687108966ac%26pid%3D100675%26rk%3D2%26rkt%3D15%26mehot%3Dpp%26sd%3D133343274137%26itm%3D193333434254%26pmt%3D0%26noa%3D1%26pg%3D2380057&_trksid=p2380057.c100675.m4236&_trkparms=pageci%3A6d98aff9-57ed-11ea-9875-74dbd180a3b2%7Cparentrq%3A7d37f6971700ad3dd31cc7a3fff7e68a%7Ciid%3A1
For some reason in the first pic looks like a little model.