Hello, new to the forum. I picked up a 04 pred 500. After I got it home it has started smoking under throttle. my buddy and I tore it down yesterday and cleaned the carb, checked valve clearance(little off), inspected and tested fuel pump(tests fine), changed plug, oil, filter, and did a compression check. Not a lot of history on machine, guy I got it from only had a year. said he just had timing chain, and some other stuff done. It looks like blue smoke(color blind) smells like gas. Where else should I look? valve seals maybe? Thanks in advance for the help.