some oil questions
I purchased a 2005 vulcan 750a, in march or feb. Keep in mind this is my first bike.
The guy that sold it to me showed me the coolant reservoir and said it was the oil, and I knew no better. When the engine started to rattle a little **lifters knocking I think** I looked down at the coolant reservoir and saw that things were good and left it.
After all these months a muddy who knows a lot about bikes came over and checked the oil, and it was totally dry, like couldn't see any anywhere inside the fill hole. I put a quart in it, then a second, then came on here and found out about the dang window that shows the oil level inside, and the window showed nothing, just looks black and empty, added another quart, then a second, for 4 quarts that have been put in it, and the window still shows nothing.
The engine runs 200% better than it was, but there is still the lifter rattle and a whirring sound when I get to about 3k or 4k rpms, no idea what is going on, anyone have any advice.