Blowing oil through the carburator - ZZR 250 kawasaki Motorcycles

What Would Cause My Lawnmower to Leak Oil Through the Filter

Oil in the air filter housing

fuel float stuck --- need carburator repair -- to check it has spark then pull spark plug --- if wet blow off spark plug and check spark on plug then squirt a small fuel out of oil can into plug hole and put plug back in -- if engine fires on first pull carburator needs fixing -- check by squirting fuel in carburator with oil can and see if you can keep it running

check air cleaner and crank vent

What you have is blow-by. But you should really post it on automotive, or motors, not GPS receivers.

Your breather valve may be stuck, and the intake valve (not sealing well) / rings (worn or sticking) may be pressurizing the crank case.

You might also have too much oil in it, but that would also cause it to produce copious amounts exhaust smoke.

One of the problem could be is you have one of the line in this case top line in the carburator clog. For clean the carburator You need to remove first the cover for the filter 2 screws on front of the carburator remove lines mark the lines top and bottom remove slowly the carburator be careful with the gasket. The carburator have 4 little screws removed and remove the black gasket (diaphragm) clean with carburator cleaner and air, blow air thru the top line tube, now on the otherside remove the screw and clean the gasket and the carburator inside do the same step. Make sure you clean the fuel filter inside the tank with carburator cleaner.

This is called blow-by, the oil rings are gone in the engine.

Check pcv valve and vacuum hose to make sure they are working. Chances are that you have a broken or worn ring, or worn engine bearings. (excessive blowby) In which case there's not much short of rebuild or replacement of engine that will cure problem. You could remove the hose that is bringing the oil into the air intake off the air cleaner and route a longer hose into a can or something temporarily but it's not a cure.