I am still running-in my engine with the carb needles at factory settings i.e. high-speed at 1 7/8 and low-speed at 1 3/8 turns out. The engine is definitely running rich - when throttling up, the engine hesitates, and the engine floods and dies after running for about 20 mins at low speed. I find that the fastest way to drain the excess fuel in the engine is by removing the carb and tilting the engine sideways while pulling the starter. The needles definitely have to be leaned out, but I would like to find out from DBXL owners how much have they turned in both their low-speed and high-speed needles. Thanks for sharing.