I know that some of you are going to think that I'm a real dumbass for what I have been ignorantly doing, so please be gentle...
My 2013 ZX-10R was purchased brand new off the dealership floor, on a closeout special, in February 2015. This was definitely not my first motorcycle or even sport bike, but it was my first Kawasaki brand.
Upon changing my oil the first time, I followed all the steps that I had taken in my numerous other motorcycles in the past -
Put the bike up on stands to get it off the ground and level
Run it for a little while to get it at operating temperature and the oil warmed up
Unscrew and remove the drain plug, and begin to let the oil out
Unscrew and remove the oil filter, and let it drain out
(sometimes I'll let the bike drain for 24 hours, as it's just in the garage and am not needing it ASAP)
Put a new oil filter on, with a bit of oil on the rubber seal, and tighten to appropriate tension
Put the drain plug back in and tight to appropriate tension
Fill the oil level to just the top of the glass window (as I have found this is just about the perfect measurement to have the oil end up back in the hash marks, after running and filling the oil filter
So, everything is ready to go for a start of the engine
Started the engine and found that no oil was draining out of the glass window....
Called the dealership where I purchased the bike from, as I had never seen this happen before....
The tech tells me that perhaps some type of vacuum occurred in the engine, and that a quick way to resolve that, is to release the oil filter from its fully tightened position, with a small amount of space, so that there's a release on that vacuum lock. Then to start the engine, and when I see oil start to push out of the hole for the oil filter, to shut the bike off and re-tighten the oil filter.
Did that, and it worked, the oil started to properly flow and not be locked at full height in the glass window/level.
The next time that I changed the oil, the same thing happened with the glass window... Hmmm, ok, I'll just duplicate what the tech told me to do, and chalked it up as some type of bizarre behavior with the Kawasaki.
Thus far, perhaps I've been super-fortunate that the bike continues to operate and perform great (you can see in videos), but this oil change issue / behavior has plagued every time that I've performed the activity, but perhaps only one time (and I change my oil after every track weekend, and that's all the bike is now, is a track bike, after 350 miles on the street for break-in).
Recently I brought this up to someone whom I trust very much, and he looked at me like I was nuts/foolish for doing this, for so long, and that I'm in jeopardy of ruining my engine....
So, I'm ashamed that I was so ignorant, but it wasn't that big of a deal to me, just something of an extra step in changing the oil.
Has anyone heard of this?
Are there other people out there with similar issues and their ZX-10R's Gen 4?
I called Kawasaki customer service, and asked if there'd be leniency on a potential warranty claim (since I only have about 2500 miles on the bike, with no engine modifications, just suspension and such for the track), and they said to take it into the local shop, and have a review by the tech. So, it's been up there for a week, and haven't heard jack-squat from them. Perhaps when they open back up tomorrow, after the weekend, they'll get me some real answers as to what this bizarre behavior is about.
Again, please be kind and don't flame on me too much for being a nit-wit!
I'd very much appreciate if anyone who has true mechanical knowledge of the bike, would share their thoughts on what this bizarre behavior might be (wrong with the bike).