Hey my friend`s dad has an old suzuki ct125, I think thats what it is. Anyways I rebuilt his carb a while back and apparently none of us even thought about checking the oil, and it turned out that it had no oil in the crankcase at all. BTW it`s a 2 stroke. My buddy was riding it around like that and it suddenly died. Now when you pull the pull start it feels like it has not compression, but I can feel pressure when I stick my hand on the exhaust. He wants to pay me to fix it but I`m not sure exactly whats wrong with it. I popped the valve caps off and I didnt see the rockers move. My first guess is the piston. Any ideas? I mostly work with 4 stroke engines.