12-26-2019, 01:15 PM
Tom, the intake ports are directly connected to the exhaust. Theoretically, air could get in and cause a lean condition. Part of the crankcase charge could escape out the exhaust. There's really insufficient time for any harm power wise or mixture wise, and the amount of overlap degree wise is very small but why take a chance? The collapsed ring is the best answer. I found an old Homie XP1000 cylinder out there, so it'll hold the ring while I heat it up. It's the same bore as the 610. TJ