Hi all. I recently acquired a 1973 Yamaha 80cc GT1 dirt bike for free from an old friend. This little bike has the "torque induction" tank on the side, that I am guessing is just for 2-stroke mix oil, though I'm not sure If I have to use it, as it is unattached as of when I got it. So I just mixed up a little 20:1 and pushed it down the road and jumped it. It ran kinda funky when it finally caught, and I proceeded to go for a little ride, but the throttle feels ok, but doesn't act it. It wasn't responding consistently on my throttle input, and after a few minutes, it started to run wide open (lots of snot in this little old bike) and then sputtered out shortly after. Repeated attempts to jump it failed. I tried again after letting it sit for a bit, and it started, but the throttle just seemed to kill it. It also never ran wide open again on several more attempts. Any advice on what to check/do would be greatly appreciated. I do in fact have a mostly dissasembled parts bike. Thanks in advance.