Some backstory first: Engine is a typical ebay 80cc 2 stroke kit When I first mixed the fuel, I negligently calculated the ratio wrong and ended up with 2 gallons of mixed fuel with a ratio somewhere between 32:1 and 40:1. I have used up almost the entire 2 gallons. The bike has been rode for around 100-150 miles so far (for the past 20 days). The climate where I live is generally cool (San Francisco) During this break in period, RPMs ranged between low and high, but cruising was always low to medium. During this break in period, there was a lot of uphills (SF) and in some cases I had to assist by pedaling. Break in period seemed to go good as the engine developed a lot of power during the period. Engine has no problem starting or idling Basically I just realized I have been running with quite a low oil to gas ratio for the break in period and was wondering if it seemed to have gone great, is there any underlying damage that could have occurred? For example, I know that piston and cylinder walls can be scored and damage can be done to the piston rings, but all those would result in a loss of power. If my power has only been improving during the period, can I assume that no damage has been done?