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learning2fly

Oil change on YZ426

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Ok, a buddy of mine lent me his bike to keep for a while as a 'buddy bike'. Its an '00 or '01 YZ426. I've used it maybe once taking out a friend in the last 6 months, was thinking of taking out another friend, so I thought I'd do some basic maintenance.

Check the air filter... it began falling apart while being soaked in the no toil cleaning solution! Got a new air filter!

Found out my '04 YZ250F oil filters will work, cool, I've got a bunch of those... got the 426 started, warmed it up, shut if off, found the bottom drain bolt, drained oil from frame and engine... WOW was it broken down and runny!

Went to change the filter, and ran into trouble, and here is my question... do you REALLY have to take off the EXHAUST to change the oil filter on this bike?!?! The top bolt is blocked by the exhaust pipe, I can't see a way around it! I tried to loosen the bolts on the exhaust, and they didn't want to budge. So I got nervous, being that I really don't want to have to pay for having any bolts tapped out, and I stopped, filled it with new oil, and called it good (or at least better than before!)

Anyone with one of these bikes have any suggestions, something obvious I might have missed?

Also, I added 1.3 liters of oil. My 250F takes 1.1, and I know the older bigger bikes take a little more... anyone know how much exactly it takes?

Thanks! :)

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Ok, a buddy of mine lent me his bike to keep for a while as a 'buddy bike'. Its an '00 or '01 YZ426. I've used it maybe once taking out a friend in the last 6 months, was thinking of taking out another friend, so I thought I'd do some basic maintenance.

Check the air filter... it began falling apart while being soaked in the no toil cleaning solution! Got a new air filter!

Found out my '04 YZ250F oil filters will work, cool, I've got a bunch of those... got the 426 started, warmed it up, shut if off, found the bottom drain bolt, drained oil from frame and engine... WOW was it broken down and runny!

Went to change the filter, and ran into trouble, and here is my question... do you REALLY have to take off the EXHAUST to change the oil filter on this bike?!?! The top bolt is blocked by the exhaust pipe, I can't see a way around it! I tried to loosen the bolts on the exhaust, and they didn't want to budge. So I got nervous, being that I really don't want to have to pay for having any bolts tapped out, and I stopped, filled it with new oil, and called it good (or at least better than before!)

Anyone with one of these bikes have any suggestions, something obvious I might have missed?

Also, I added 1.3 liters of oil. My 250F takes 1.1, and I know the older bigger bikes take a little more... anyone know how much exactly it takes?

Thanks! :)

You don't have to take the header pipe completely off...at least you don't on my '02 426. It takes a little bit of torque but just loosen up the pipe where it connects to the head and then loosen up the clamp where it connects to the exhaust pipe. This should give you enough play to rotate it up just enough to get to the top bolt for the oil filter cover. On my '02, the outside bolt for the header pipe is already studded into the head so it's just a nut you are removing, the inside is actually an allen head bolt. Just be careful taking these off and making sure not to over torque them when putting them back on. As far as how much oil...the first time I fill up my bike after an oil change it takes 1.5 quarts. After I let it run and cycle the oil I usually end up putting the rest of the 2nd quart in there to top it off. Keep a check on it and be sure not to over fill it. :banghead:

I see you mentioned draining the oil out of the bottom of the motor...you do know there is a frame drain plug on these bikes too? It's the bolt right behid the front fender on the frame.

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Hey, how ya doing?

It sounds like you have an earlier 2000 model there, and yes, the headers were in the way on those. Loosen the clamp at the mid pipe first. At the head, there should be a nut/stud on the outside, and an Allen on the inside. Shoot them both with penetrating oil and let sit a few, then loosen the nut first. Apply heat if needed. Taking the tension off the stud will relax the load on the Allen as well, and make it more likely to cooperate. Once loosened, you may be able to roll it up out of the way.

The '02 and earlier model YZF's take 1.6 L of oil when the filter is changed, 1.5 when it's not. Fills at the dipstick, in the frame.

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