You've got an vintage racekart frame from the 70's/80's era. Back then, there were over 50 different racekart brands that were all pretty much copying each other and building very similar appearing frame designs. Hardly any of those brands ever stamped their brand name onto the frame, i saw your serial # pic, but it's not much help in ID'ing it's brand.
The good news is most of the componets you need will interchange from other racekart brands and bolt right on.
I used to race karts like yours at tracks and have helped serveral guys like yourself here on this forum who bought bare racekart frames needing lots of parts. A few things i can tell you from experience are:
1 - You can typically buy an older 'Complete Roller Racekart" (that means everything except the engine & clutch) just like yours for like $400.
2 - Buying all of the brand new, racekart componets you need for your frame will probably cost at least $2,000, and result in the complete running kart only being worth like maybe $600 when you sell it... Building a racekart from a bare frame like yours is the absolute most expensive way to get a racekart.
3 - When racers sell off their bare frames (like yours), It's typically because the frame was somehow damaged from a wreck (or 'flexed-out') and no longer handled correctly; so they bought a replacement frame and transferred all of their old componets over. Then they sold the old damaged frame off...
4 - Racekarts like yours only have like 1 inch of ground clearance, you cant hardly ride them anywhere except on perfectly flat surfaces like paved roads without constantly high-centering and scraping the frame against the ground.
5 - I'll help you find parts that fit if you still wanna build this frame.
You'll find most of the racekart parts you'll be needing at this site if you wanna check it out:
https://cometkartsales.com/home.php
