The reason a rich engine will bog down and build up carbon is an excess of oil. The oil in the mixed gas does not burn nearly as well as the actual gas, so the larger percentage of oil you have in you mixture harder time the engine has firing which in the root of the bogging in the first place. Oil in the engine, while turning over acts like dead wood, it holds the RPMs back. If your bike is running rich a non-evasive way to fix the problem is to simply add less oil when you fill up your tank. Since the engine can now cycle with more ease. The logic you used in your last post sounds like something you would here on an infomercial, the figures look good but in truth it's a whole load of BS.