u mean a main jet of 37 right ? not 370??
No, he means 370.
Good job on the bike too. Coming along nicely. Also, I doubt that needle was broken. A lot of needles from that era weren't actually adjustable and only had one setting. Different needles were purchased individually as required. Pre 90 MX is really picking up in popularity if you were interested in that. Those guys ride and race on some very good, fun tracks.