Not all karts had model numbers. Some just went by name. MANCO used a lot of different model numbers because they made karts branded by so many different companies. Most kart parts are generic. If you want to know what bearing numbers to get then remove the bearings and get the numbers off of them. Manual disc brakes for karts were all manufactured with the same Air-Heart design. All replacement parts interchange regardless of manufacturer. See, it’s not that difficult. That kart has been out of production for almost 20 years or so. You just have to be smart enough to out smart the lack of parts. I have a Streaker also. I know of what I speak! Good luck!