Hello, I’m Caleb, I’m a 16 year old who went to a trade school for diesel technology, it’s nice to meet you all. I was given a (believed to be) 1991 Yamaha Blaster 200cc as, I guess, a summer project. When it was given to me the previous owner of the gifter had bored it out and installed a bigger piston, enlengthed the axles, and put on an after market Keihin carburetor, not sure of any of the specs. The one who gifted this to me said he flipped it And only ran it a few times after but when he did it took him sometimes a half an hour to start it, so when I got it the first thing I did was use engine degreaser (a safe brand not bad for rubber or plastics) to clean the whole quad itself, then I proceeded to remove the carburetor, I was told it originally had an oil injector but it was deleted from the quad, and the TORS was also removed. Once I cleaned the carb (removed the bowl, float, float needle, and the main and idle jets, cleaned it all thoroughly, put it back together and put the carb back on the quad, I cleaned the old several year old gas out of the lines and tank, flushed the lines and tank to remove the varnish created by the gas, I then added fresh mixed gas (ratio of 32:1) I then proceeded to attempt to start the quad. It started on the first kick every time started but the issue hasn’t started yet, the next day went by and I went to the lake to fish and swim, then the following day I started up the quad and let it idle for a bit and out of nowhere it began revving itself to max, the throttle wasn’t touched, the throttle doesn’t seem to be stuck, there’s no TORS, and the one who gifted it to me said he had it running a time or 2 after he flipped it and it didn’t do this, so I caused this by messing something up when either cleaning the engine or the carb. Please help! (If you need part numbers, or specs please provide info on how to find the information needed, such as the location of the part number)