yz450 burning oil


8 replies to this topic
  • ktown yamaha

Posted August 09, 2008 - 03:45 PM

#1

My yz 450f seems to burning more oil then it should, does that mean its time fore some new piston rings?

  • reed156

Posted August 09, 2008 - 03:55 PM

#2

Yep Sounds Like Your Oil Ring Is Worn. Thats The One On The Bottom Its The 3 Peice Ring. Take A Look At The Valves To Make Sure There Isn't Any Oil Residue On Top Of The Intake Valves That Would Indicate A Guide Seal Or A Guide Problem

  • ktown yamaha

Posted August 09, 2008 - 06:58 PM

#3

right on man thanx

  • bigred455

Posted August 09, 2008 - 08:59 PM

#4

Why do you think it is burning oil? How do you check your oil level?

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  • desert-rat660

Posted August 09, 2008 - 09:44 PM

#5

does the bike have alot of blowby? my piston and rings were shot and everytime i rode my foot would get covered in oil from the breather hose.
i replaced the cylinder and installed a je 13:5:1 piston. installed stainless valves and kibble white springs and valve seals. took care of my problem

  • ktown yamaha

Posted August 10, 2008 - 12:21 PM

#6

because when i whent out the other day i had just done an oil change and my oil level was normal, after i returned from the ride i had barely any oil on the dip stick.

  • desert-rat660

Posted August 10, 2008 - 12:22 PM

#7

did u check the oil level with the engien warm?

  • bigred455

Posted August 10, 2008 - 05:29 PM

#8

because when i whent out the other day i had just done an oil change and my oil level was normal, after i returned from the ride i had barely any oil on the dip stick.



Exactly how do you check the oil?

  • rjcook450

Posted August 10, 2008 - 06:33 PM

#9

you should have the service manual, walks you through everything, same one dealer mechanics use, (not trying to sound like a jerk here) anyways after oil change and refilling i start mine up until warm then check dipstick and add oil if necessary, you're supposed to loosen oil pressure check bolt also ,but i never do.





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