Check the oil cap and the drain plug, as well as the oil filter.
ex250 ninja 2008 10w fork oil, 360 ml and 108 mm air gap
10w40 but it should be approved for wet clutches.
its not really picky but I'd go for 5w40
300cc from Mobile Cycles in san diego, CA
it says 1.9 liters on the side, that's about 2 quarts.
you may add any 10w40 or 20w50 MOTORCYCLE OIL DESIGNED FOR THE WET CLUTCHES ON MOTORCYCLES.Do not use car oil.
can a knock sensor leak oil for 305
Head gasket may be blown allowing oil to leak into the coolant chambers and be returned to the radiator
use leak stop or something. Where is your oil leak?
You should buy probably buy 5w40 this is the most commonly used oil for motorcycles but realisticly the 250 is not picky and anything will work. the one thing to make sure you dont buy energy conserving oil, I guess its not good for the clutch. http://faq.ninja250.org/wiki/Engine_Oil
Answerbuy an o ring if it has gone over 250 miles
your just have to look if oil check in valley of engine most will leak up top and run to back of engine and drain. color of fluid leaking will point you in direction of system that has the leak like red = power steering blk= oil ect.