Just did first oil change on my CTX700. I almost removed the wrong engine oil drain plug! I thought it was the drain plug on left side/bottom of engine which uses a 6MM allen cap screw recess in it. Luckily I found the correct plug which had a 12MM hex head. The rest of the oil change went well. But, my question is what is the 6MM allen head screw plug? It must be a drain plug of some type as it has a copper washer under it. It is just below the clutch cover. One last comment: I do not have the DCT model. Thanks!