Hey all, I finally got my 1986 vf500f running, the previous owner says it sat for years. I rebuild the carbs and did a bench sync and have new oil in it. After letting it run for a couple minutes I noticed a very bad oil leak out of the exhaust where it connects to the muffler. Its a 4-1 system. And the idle is erratic. The PCV system was completely bypassed by the previous owner. Could that be the cause or could the piston rings be bad?