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So I purchased a brand new 2019 Ninja 650 ABS about a month ago, and just rolled over 1800 miles last night. I'm new to street bikes, my motorsports experience is in the car world. Love the bike, been very happy with my purchase so far. Had the dealer do the first oil change at approximately 530 miles, as well as do a general new bike checkup.

I did a second oil change at approximately 1550 miles. I filled it to the top level mark with the bike held upright on level ground. If you tipped the bike a bit to one side it would go over the top line, tipping it the other way would go under. Figured this was okay.

After this 2nd oil change, I noticed that the oil had air bubbles throughout it (not just on the surface) and thought this was a bit odd. Figured it might have something to do with the gearbox and wet clutch churning it up all the time. But I had this nagging feeling that I might have overfilled the oil despite it being right at the top line on the sight glass.

So 200 miles later (~1750 miles), I changed it again. Now with the bike upright and level the oil is right in the middle of the two lines. It seems to run smoother and I noticed zero air bubbles in the oil, even after riding for several hours. There's still some bubbles on the surface but from what I understand this is normal.

Basically, I'm worried that I might have overfilled my oil and potentially damaged my engine (specifically my main bearings / rod bearings). Even though the oil appeared to be right at the top level when I changed it the first time. I rode the bike to redline on a regular basis during those 200 miles when it was at this level, merging on and off the highway frequently, as well as zipping through city traffic. I suppose I'm an aggressive rider (throttle) in this respect.

What do you guys think? Have you ever noticed any issues with filling the oil to the max line on these Kawi 650 parallel twin engines?
 

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Hi there, as I've written here many times more oil is as bad for the engine as less than the recommended amount.

One guy in this forum overfilled his bike with oil and destroyed it.

Always add the amount of oil specified in the manual for the equivalent type of oil change, it is as simple as that. If in doubt, measure it.

Only mechanics or stealerships on a mission to take more money out of your pocket will say things like "oh, I put a little bit more because the line wasn't in the middle bla bla bla".

Come to think of it, by adding just 200 ml more during a standard oil filter - oil change they can charge you a whole one liter bottle of oil more without even using 80% of it!

So just add and pay according to the manual only.
 

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Discussion Starter #3
Hi there, as I've written here many times more oil is as bad for the engine as less than the recommended amount.

One guy in this forum overfilled his bike with oil and destroyed it.

Always add the amount of oil specified in the manual for the equivalent type of oil change, it is as simple as that. If in doubt, measure it.

Only mechanics or stealerships on a mission to take more money out of your pocket will say things like "oh, I put a little bit more because the line wasn't in the middle bla bla bla".

Come to think of it, by adding just 200 ml more during a standard oil filter - oil change they can charge you a whole one liter bottle of oil more without even using 80% of it!

So just add and pay according to the manual only.
When I did the oil change the first time, I filled the oil filter up all the way before installing it. When I went to put it on, a large portion of the oil in it spilled out so by the time I filled up the bike with oil I had used both quarts. In the manual it states a 1.9 quart capacity if you replace the oil filter, so I suppose the most I would have overfilled it was 0.1 quarts or about 100ml in a worst case scenario. I let all the old oil drain out until it was dripping, had the bike mounted upright in a front wheel stand.

So, let's say theoretically if I had overfilled it by 100ml do you think this would've caused damage in 200 miles of aggressive riding?
 

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When I did the oil change the first time, I filled the oil filter up all the way before installing it. When I went to put it on, a large portion of the oil in it spilled out so by the time I filled up the bike with oil I had used both quarts. In the manual it states a 1.9 quart capacity if you replace the oil filter, so I suppose the most I would have overfilled it was 0.1 quarts or about 100ml in a worst case scenario. I let all the old oil drain out until it was dripping, had the bike mounted upright in a front wheel stand.

So, let's say theoretically if I had overfilled it by 100ml do you think this would've caused damage in 200 miles of aggressive riding?
Next time just put some oil on the rubber seal part of the filter with your finger to ensure a tight seal, that should be enough.

My guess would be probably not and from now on the manual will ensure your peace of mind.
 
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