engine bearings YZ 250

[D.N.I]

Hi mates!

as you might know, i´m in the middle of my rebuild of my "new" old 2001 YZ 250

and now that i sent the crank and cylinder for reapairing, another big question awaites me

which bearings do i need for the engine and which size/specifications do they have?

originally koyo are used, but i don´t know, which bearings i do exactly need and i don´t want to buy the wrong ones.

you would reallly help me, my search at google wasn´t successful

greets and thanks in advantage

Dani

[adam8781]

get all the bearings and seals out, bring them to your local bearing supply, they will stock 90% of them for dirt cheap and you can get some quality made bearings for dirt cheap.

Rebuilt cousins 08 yz125, hot rods crank and bearing kit.

rest of the transmission bearings came from boca bearing, along with most the seals to. 2 years later still purrs like a kitten

[D.N.I]

Thanks a lot for your answer, but The problem is that i don't have such a shop within 100 km that's why i would like to prder them in the internet ^^

[GCannon]

Use the numbers off the bearings.

avoid bearings made in China

[D.N.I]

I can't get the tranny out, so i can't see the numbers of all bearings.

I askes koyo, if they know, what kind of bearings i need, but they couldn't help me so i would be really thankful if someone who did such a rebuild already could help me

[D.N.I]

would it be possible, that these numbers i found :

6905rs

6001

6905

6004

608

6205z

83a915

6004rud

are the correct bearings for my engine?

please tell me your opinion, i´m pretty desperate right now

[adam8781]

Click this, and download it, its a pdf manual for your 2001 yz250, in there (have fun searching) there should be specs or part numbers for your bearings

http://www.yamahaownershandbook.com.au/lib/download.php?f=5MW-28199-30.pdf

And if you have the crank sent out for repair, than the cases must be open, start pulling alll the bearings out, one one side of each bearing there should be listed specs.

[adam8781]

Click this, and download it, its a pdf manual for your 2001 yz250, in there (have fun searching) there should be specs or part numbers for your bearings

http://www.yamahaownershandbook.com.au/lib/download.php?f=5MW-28199-30.pdf

And if you have the crank sent out for repair, than the cases must be open, start pulling alll the bearings out, one one side of each bearing there should be listed specs.

[adam8781]

Click this, and download it, its a pdf manual for your 2001 yz250, in there (have fun searching) there should be specs or part numbers for your bearings

http://www.yamahaownershandbook.com.au/lib/download.php?f=5MW-28199-30.pdf

And if you have the crank sent out for repair, than the cases must be open, start pulling alll the bearings out, one one side of each bearing there should be listed specs.

[D.N.I]

thank you, but i already have searched my manual and the part numbers don´t help me

[strtdsmallproject]

Im doing a bottom end rebuild right now on my 2001 and pulled all my transmission bearings. I took the bearings down to my local bearing supplier and it was more expensive then buying stock ones. The bearings that are sealed on one side are not available you have to order sealed bearings and remove the seals. I stuck with simple and just bought OEM through Cheapcycleparts online. The bearings on your shift drum are kind of a pain to pull out. I had to heat the case with a torch and use a slide hammer bearing puller filed down thin to fit under the bearing.