Pete - RE the Evo 10cc
1. Will 100% synthetic oil reduce the amount of ugly black hard to remove crud in the exhaust while using "Blended" oil?
2. Is there a method to stop the muffler joints from leaking this stuff? Somebody mentioned that his came with "O" rings installed in the center section. Mine didn't. Standard "O" rings installed blow out after a few runs.
2. Is the stock muffler "tuned" for a increase in power over other designs so should not be modified in shape?
3. Is the stock muffler pressure required for appropriate fuel delivery to the regulator? Therefore should not be changed?
Note. The motor itself is a very good design, powerful for that size running gasoline and runs super good. But the exhaust is a model destroyer in the long run, even using an after market silicon exhaust diverter which does not help because of the muffler leaks in all of it's joints including the threw bolt head and nut.
Ken