Kx450f oil breather line question

B

BLR STS

Member

Jun 10, 2008

18

0

• Aug 27, 2010

• #1

The other day who wanted to trade bikes and he asked me to start it up so I did and started reving it upreally hard and oil started coming out of the breather tube. Ive never had this happen to me and dont know what causes this. Can anyone shed some light on this issue for me?

 

M

Matt90GT

Member

May 3, 2002

1,517

1

• Aug 27, 2010

• #2

more than likely the motor is overfilled with oil or the wrong weight of oil (not allowing to drain back to the bottom of the motor, pooling in the top and out the overflow).

Other causes, piston blow by.

 

B

BLR STS

Member

Jun 10, 2008

18

0

• Aug 27, 2010

• Thread starter
• #3

ive always used 10-40 snythetic and I started it up again and it didnt do it..?

 

B

BLR STS

Member

Jun 10, 2008

18

0

• Aug 27, 2010

• Thread starter
• #4

If I do have blow by to I have to replace the piston?

 

M

Matt90GT

Member

May 3, 2002

1,517

1

• Aug 28, 2010

• #5

Specs for the 08 say 10w40 1.2L

So check your level next time you do an oil change.

If you have blowby, you more than likely need to at least rering the piston if not replace it and hone the cylinder.