So I bought an MT non running as a project and then put it all together. Got it running but it ran like crap (hard to start, no power, won't increase in revs). So I put my finger over the spark plug hole and pulled and saw it had low compression. So I put a new piston and cylinder on it and then had the same issues, although it was easier to start. Then I put a new carb on I since it had been sitting a while and still same issues, even though it starts and runs a little better. But it still has no power and won't get over about 10 mph unless going down a hill. If I hold it off the ground it'll rev all the way through the range. I'm using 91 pump gas with royal purple synthetic 2t oil (same that I run in my dirtbike, good stuff) and have tried fresh fuel. I don't have the fuel lines reversed, I can tune the carb all I want and it still has no power. Starts right up and then it's a snail. What else can I try? Plug has good spark as well and everything is sealed nice and tight.