Do two stroke engines for small aircraft suffer from degradation between overhauls?
For an automotive engines you can usually expect it to retain most of it's power between services for a long time until a specific failure occurs. During the time between overhauls on a small two stroke aircraft engine like a microlight, does the power available drop noticeably over time and increase after an overhaul/rebuild? Seeing as these only have a small power available to them to the begin with, as in 20-60hp, and this is in turn reduced with altitude, you would have to adjust your flight planning to compensate.
The other option is to have the TBO set to make sure things are changed before power loss becomes an issue, but this would necessarily involve changing out components while they still have usable life in them.