After a hard, high-speed ride I notice there is a mist around the exit of the KrankVent. Whats going on?
A6. This is tougher to answer, but here is what I believe is happening. First, the engine must exit a small amount of air/oil while running to compensate for engine blowby, air leaks, etc., depending on how tight the engine is. However, while riding hard or on a dyno pull, often the throttle is shut off quickly, manifold and combustion chamber vacuum goes way up, and piston rings can “break seal” and start to flutter momentarily. When this happens, combustion pressures get past the rings, into the crank case, and momentarily blow out the breather. However, the KrankVent greatly reduces this effect by quickly restoring the vacuum and ring seal. If you don’t believe this, take the KrankVent off and do a hard dyno pull!
