blowing oil out of my crankcase breather

[timay4337]

anyone know why there would be oil coming out of my crankcase breather and some into my airbox, I JUST rebuilt my motor. Has about 3-4 hours on it. the rings are in right and I cant think of anything else it can be. Also a completly unrelated question, is there supposed to be splines cut into the washer that goes on my clutch basket. any help would be appreciated

[IRONFLIGHT2]

check to see if your oil is returning to your resivior. it could be the oil pump is not working correctly and the oil has no were to go, it is just staying inside the motor.I just had this problem and that is what it was on my bike the oil would come out thru the breather and even some past the rings and thru the filter.

[timay4337]

yeah thats sounds like a possibilitly, how do I check it?

[IRONFLIGHT2]

probably not the right way to do it but run the bike and pull off the top line of the oil resivior and see if it is spitting out oil.( thats what i did).DO NOT RUN IT LONG.The right way to do it would probably be to pull off the allen bolt on the top right side of the motor just under the valve cover and check it with an oil pressure gauge.

[timay4337]

ok so i pulled the top of my oil line of and it was blowing oil out really good lol. so whats the next in line to check?

[LTR450_#67]

How much oil did you put in after being assembled?

[timay4337]

Originally posted by LTR450_#67
How much oil did you put in after being assembled?

quart and a half in the tank and half in the engine

[LT-R450 131]

The exact thing happened to mine right after the rebuild at about 2-3 hours also we r taking it in this week I'll let you know what it is if we find out.

[timay4337]

Originally posted by LT-R450 131
The exact thing happened to mine right after the rebuild at about 2-3 hours also we r taking it in this week I'll let you know what it is if we find out.

thanks i would really appreciate that, i think its the piston rings.

when your getting oil out of your breather your getting a blow by from the rings not sealing right or cylinder is not perfectly round anymore. Its letting to much compression by into the crank case blowing into your intake. Or you have to much oil.