[greg737]

Not on the center stand!

Here's what the ninja250.org FAQs have to say about checking your oil:

Here's how the owners' manual says you should check it: "Check the engine oil level through the oil level gauge. With the motorcycle held level the oil should come up between upper and lower level lines next to the gauge."

This translates as: "Full" is the top line (near the top of the window) when the bike is held vertical and both wheels are on the ground. Keeping the oil at or close to the upper mark is desirable, but do not overfill it, as you could blow a gasket. Only add a small amount at a time.

Note: When the bike is on its centerstand the level in the sight glass will be lower. When both wheels are on the ground the level will show a more full reading. (The bike is tilted forward and isn't level when on the centerstand, so the level appears a little lower.)

Here's a link to the Oil FAQ entry: http://faq.ninja250.org/wiki/How_do_I_check_my_oil%3F