why is this happening?

[blackwidow450r]

I recently rebuilt my motor because i pushed the shifter rod through the bottom of the motor. I changed all the bearings and seals, also the i put new rings on the stock piston. Now the motor is pushing oil through the transmission breather hose. If anybody knows why this could be happening please tell me!!

[hondaryder42]

i pulled a dummy once and the breather hose on the back of the motor came off ( roll over ) anyways i thought it should go to the nipple on right hand side of carb.... but it does NOT. for the week i rode it i had oil come out as well on tranny side. the hose goes to the plastic shield under the seat. you have to remove some rubber flaps to see it.

[xc400ex]

If you had the lower end split its possible the new gasket or sealer is blocking an oil passage way. This will make them squirt oil out of the breather.

[blackwidow450r]

I was wondering if you knew if i had to modify any of the gaskets when i was puting the motor back together? I know about the gasket that had to be trimed in the cyclinder, but that is obvious. The manual didn't say anything. I seperated the cases twice just to make sure i had everything perfect. Evertime i did it i used new gaskets. I have no idea why this is happening. I was told maybe the cyclinder is out of shape, but the cyclinder is spotless. If you have any idea please help!!

[xc400ex]

No it would have nothing to with the top end since it runs off the left side motor oil. I would get a second opinion maybe have someone look at it before I split the cases again but that would be my guess to the problem.

[Hammer trx450r]

Are u absolutly sure u didn't overfill?

[xc400ex]

Yeah maybe thats your problem I didnt think of the simple things.