2002 YZ 426 about to purchase

That's correct. The kit removes the return pump and routes oil from the sump screen directly to the feed pump. To restore it, you need the complete original return pump and separator plate, both oil lines, and all necessary fittings.

I checked the factory service manual and called a couple Yamaha dealer part departments and neither them nor can find any info on the return pump or related parts. You guys wouldn't happen to know of any part numbers to the return pump or separater plate would you?

Dan I wish this would have come up sooner. I left the pump attached to the cases when I sold them to another member on here a couple weeks back. I don't think he even cared about them, just wanted the cases. I could have thrown them in with the lines I sent you.

I can see if he would be willing to sell if you want? Or maybe you are thinking new

Rob

Edited by 03YZ85

That post is a good reference. The separator plate is a part of the oil pump assembly (1), and not sold separately. If you don't have it, you'll need a new pump. The return pump is the rotor set (2).

Dan I wish this would have come up sooner. I left the pump attached to the cases when I sold them to another member on here a couple weeks back. I don't think he even cared about them, just wanted the cases. I could have thrown them in with the lines I sent you.

I can see if he would be willing to sell if you want? Or maybe you are thinking new

Rob

Yeah, actually I'm trying to find which gears make up the pump. If you have a way to get them back I would be glad to purchase them. Or if anyone knows what i could tell the parts department at my local Yamaha dealer. Like maybe part numbers. No one else seems to know.

Edited by Deepseadan

Did you look at the post he linked to? Covers everything you asked for.

Did you look at the post he linked to? Covers everything you asked for.

Sorry and oops, somehow I skipped right over it. Thanks you guys.

Grayracer you were dead on with all you're advice. I finally got to the oil pump and it was exactly as you explained. Thanks for the good advice. Now I just have to get the parts and put it back to stock. I have a complete pump on the way.

Alright well I got the bike converted back to using the frame for its oil resiovior and it was quite a bit more involved and expensive than I thought it would be. Thanks for all advice and parts everyone. I feel much better now that there's an additional quart of oil in there. I rode the bike down the street and its way different than my xr400. Way more responsive and the suspension feels way better ( of course it's been re-done to my weight). This bike really suprised me with how fast it is. Just wondering, has anyone owned a crf450 or yz450 and a 426? How do they compair in engine power and performance?

Just wondering, has anyone owned a crf450 or yz450 and a 426? How do they compair in engine power and performance?

most people say the 450 is night and day differeance over a 400 or 426, but I have both and disagree

I own a 98 yz400f and an 08 yz450f and they are about the same to me

the chasis/weight differance is immediately obvious, the newer bike is much better, but for sheer straightline power they seem virtually identical. I actually think the 400 is better when chugging at low rpm, but I got an 06 cdi for my 08 which will hopefully fix that

that being said, I am no pro level rider, and I certainly don't utilize the bikes to their max.. they are both overpowered for me :)

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