FlatheadsForever87
Member
Quick question for you guys, what is the worse things you have seen when a flathead it beyond a rebuild? Is it just a slight loss of power, or a big one? Is it a lot of smoke or flames shooting out exhaust without actually backfiring? Mine is doing the latter and I assume it's because it is over due. Last time I freshened it up I honed the cylinder and replaced rings on a used piston. I done them the best of my ability with the knowledge and resources i had available. The guides were decently sized to the used valves. I have ran the snot out of it for quite a while. I changed oil about ever 2 hours or so. And lapped the valves every 6 to 8 hours. I probably have 18 maybe 20 hours total run time on this build. With the last hour or two I can feel a sharp decrease in overall performance. I love flat heads but I camt imagine being on a racing schedule and trying to pay someone to keep one of these dudes in optimum condition. A man would go broke lol.