i know this has been asked and I checked the index but could not find the answer. I did the creeper oil change, put in 2 liters of oil per instructions. This included a full changing of all the filters and draining the frame of oil as well. Burped the frame per instructions. Bike doesnt have any of the noises indicative of low oil but despite the fact I know I put in the right amount I dont see any oil inthe sight window when the bike is parked. It is splashed around when idleing so my questions are. What is the total amount of oil your supposed to add to the 640 when you do a complete filter change and oil drain from all ports. What is the best way to check the oil level in the bike once you have done all this.