My friend has an 89 Banshee, built pretty good. Recently he lost power in one cylinder. Hes planning on re-ringing it, its probably due, but any input would be appreciated on the single cylinder thing, it has spark and fuel, but is running cool. How often do you guys normally re-ring? Thanks.

 

Alot of guys r&r the top ends every year, probably not a bad idea on highly modified or heavily used motors. I keep an eye on my compression and act based on the readings.