I rode my 2000 KDX 200 this weekend and for the first lap (16 miles), I was using gas with Bel Ray H1R pre-mix. Before the 2nd lap, I needed more gas and just filled up the tank not realizing that I was adding gas with Bel Ray MC1 pre-mix. :bang: I still had about a gallon of the H1R pre-mix in the tank. The bike was running beautifully on the first lap, but after mixing the fuels, it was running like crap and missing a lot. I plan to drain the tank tonight, but was wondering if I hurt anything or if there was anything else I needed to do. I've heard that you should not mix two different pre-mix's in the same tank. Thanks for any advice/input!