Main Bearing question

[wrench]

I recently purchased a 2001 250 XC from a GGRC member.
Is there a crossover for the crank/main bearings?
I have only found listings for the '03 & up models. Are they the same?

Thanks for any info.

 

[jostby]

My '00 uses caged roller bearings on both sides. They were easily obtained from the local bearing supplier. I'm pretty sure yours is the same. '03 or '04 they changed and the left side bearing was changed to a needle bearing.

 

[GMP]

My '00 uses caged roller bearings on both sides.

You mean caged BALL bearings, the newer bikes use a ROLLER bearing on the ignition side.

The '00s use 6306 C3 each side. These are available in many brands and grades, some good, some junk. When I rebuilt my '00 low end I used M306 C3bearings. These are heavy duty equivalents of the 6306, with an extra ball and a machined brass cage. From a bearing supplier, the cost was about the same as the standard bearings would be from the dealer. I beleive these are only made by the quality Euro and Japaneeese mfgs., not duped in China with substandard tooling and materrals.

This bike is owned my member Bucksnbikes still runs today with that lower end.

 

[wrench]

Thanks for the info. Do you have a manual that gives the Part # for them?
I have been unable to find one online or the p/n for the bearings. The '03 manual shows the left/right side to be ball bearing type of diferent diameters.

My local guy (NTN distributor) needs a p/n to cross. The bike is running fine and I was hoping to get the bearings before tearing it down to do the top end for maintenance.
I figured that with it's age and not knowing it's history I want to do the bearings at the same time.

I have searched the forums for the info and was unable to find the info before posting this up.

 

[wrench]

You mean caged BALL bearings, the newer bikes use a ROLLER bearing on the ignition side.

The '00s use 6306 C3 each side. These are available in many brands and grades, some good, some junk. When I rebuilt my '00 low end I used M306 C3bearings. These are heavy duty equivalents of the 6306, with an extra ball and a machined brass cage. From a bearing supplier, the cost was about the same as the standard bearings would be from the dealer. I beleive these are only made by the quality Euro and Japaneeese mfgs., not duped in China with substandard tooling and materrals.

This bike is owned my member Bucksnbikes still runs today with that lower end.

Cool thanks for the info ... I was apparently typing when you posted! LOL
So the '01 uses the same 6306 C3/M306 C3 on both sides?
Do you remember what you used for seals? Everyone online seems to only list '03 and up.

 

[GMP]

The seal sizes are standard but the material (Viton) is not and may not be available at a general bearing supplier. I got the seals from the dealer. '00 and '01 should be the same.

 

[jostby]

You mean caged BALL bearings, the newer bikes use a ROLLER bearing on the ignition side.

You are correct. I re-read it twice before I posted and it just didn't look right (but it was early, is that a good excuse?). I should know better having been working in this industry since '84

 

[wrench]

Thanks Guy's!
I really appreciate the knowledge.

I would like to continue purchasing my parts from my local guy. I have been doing business with him since the early 80's when he was a Husky/Suzuki dealer. He is a KTM dealer now and we have been unable to locate bearing or seal p/n's older than '03 in his parts books. We have a great relationship and returns are easy since he is close by. Without a p/n to cross, we are reluctant to order the parts.

I guess I will have to try Gofasters.

 

[jostby]

I think I have a '00 or '01 parts book at home. If you can wait a couple hours I will look. You would do better to call Gofasters or another dealer though. If the numbers I find have been superceded (updated) you may end up waiting for a part that never shows up after you order it. Ask me how I know It's better to let the experts look it up.
I will let you know what I find later this evening.

 

[jostby]

left side crank seal, ME250112009
right side crank seal, ME250112008

These are from a 2001 engine breakdown. Left seal is the same, 200, 250, 300.
Right seal is different for each.

 

[wrench]

left side crank seal, ME250112009
right side crank seal, ME250112008

These are from a 2001 engine breakdown. Left seal is the same, 200, 250, 300.
Right seal is different for each.

Hey Thanks for the p/n's.
I found the bearings online (amazon) cheap, so I ordered them.
I will get with gofasters as you suggested to get the seals.

 

[hannesd]

would the caged ROLLER bearings for both sides fit an '00 300 engine?
i have a feeling mine might have this setup.
hardly any up and down play, but some side to side play... seem logically if it would have this setup.
will measure play by this weekend and determine eather to pull engine apart or not.

 

[jostby]

would the caged ROLLER bearings for both sides fit an '00 300 engine?
i have a feeling mine might have this setup.
hardly any up and down play, but some side to side play... seem logically if it would have this setup.
will measure play by this weekend and determine eather to pull engine apart or not.

If I remember correct there is machine work needed in order to use ROLLER bearings in the older engines. Also many of the crankshafts in this era were not machined for a tight enough fit to the inner bearing race making the crank loose in the bearing. I suspect you have BALL bearings and either the crank is sliding inside the bearings or the bearings are sliding sideways in the Case. I would call a dealer that is familiar with the older engines and ask what tolerance to expect. I don't think any of the manuals available online are old enough to give correct specs for Ball Bearing mounted cranks. They are for the newer roller bearing engines.