Post Posted: Tue Mar 22, 2011 4:23 pm
 Subject: Rear Wheel Bearings and lubrication

Okay, let me start off, I have read the FAQ.

For the last year or so I have been riding my bike with a rear wheel and tire from one of my parts bikes. Its time for a new tire, and I figured I would thoroughly clean and perform all the checks related to the rear wheel that actually came with my bike.

I had the wheel with the old worn out tire on it, just to help protect the rim. So I removed the tire and then decided to examine the bearings. According to the shop manuals the rear wheel bearings are sealed, and require no service....The bearings in my rear wheel must be replacements as they definitely have removable grease seals.

The bearing on the brake rotor side....uhm...there is supposed to be some grease in there, right? There was a very small amount visible on the outer surfaces of the bearing cage. I could actually see the far side of the bearing between the cage and the outer race.

The bearing opposite the brake rotor side had some translucent orange looking grease, more than the other side, but definitely not "packed full" of grease.

Both bearings look intact, no discoloration or other signs of wear or damage.

Between what I have read, and advice from some friends...I get conflicting information. Some say to clean out all the old grease thoroughly, use electronics cleaner or other high flashpoint cleaners, and clean out every trace of grease since some greases are not compatible with others. Others comment, "lithium grease, just mash it as full as you can get, any other type of residual grease will just be diluted and not cause problems".

The greases I have on hand are "Sta-Lube Extreme Pressure Moly Graph Multi-Purpose Grease", and some more generic "Lubrimatic Multi-Purpose Lithium Grease". Would either of those do the job or should I go look for the Bel Ray Waterproof that seems to be favorably mentioned on nearly every forum and website?

I'd like to do this "right", but I would prefer not to remove the bearings from the wheel, since I am concerned about damaging them and needing to buy new bearings.

So, to sum it up,

A, thoroughly clean the bearings or just put more grease in?
B, use one of the greases that I have, or get something else?

Edited - changed tire to wheel in the first paragraph.
Post Posted: Tue Mar 22, 2011 5:37 pm
 Subject: C) invest $25 in a complete set of double-sealed bearings & forget about

Post Posted: Tue Mar 22, 2011 6:07 pm
 Subject: sounds like a good solution

Today, I've been considering that, solves the issue and I know I am good to go for a LONG time.
Post Posted: Tue Mar 22, 2011 7:57 pm
 Subject: Make sure your 2RS kit also has a 6205(?) for the sprocket carrier

Post Posted: Tue Mar 22, 2011 11:53 pm
 Subject: Bearing kit with sprocket carrier bearing?

I have read through several bearing supplier sites. The industrial ones, well, I can get all the bearings, but not as a kit. I have found several "bike" supply shops as well as motorsports specific shops which list a kit for the rear wheel, but so far its been confusing. Some kits show three bearings, which may indicate a bearing for the sprocket carrier, but zooming into the photo shows the parts to be for a Honda dirt bike. Most pictures show only two bearings. Most state "complete rear wheel" but do not mention the number of items in the set.

Can anyone confirm a current kit out there that has everything?

If I can't find a complete kit, i will likely just order everything through a local ATV shop...strange that quality bearings bought separately should cost less than a set in a kit...but whatever.
Post Posted: Wed Mar 23, 2011 3:50 am
 Subject: The sprocket carrier isn't often considered part of the wheel.

Wes is the one who has been the advocate of replacing the sprocket carrier bearing. It's not supposed to need replacement as often as the wheel bearings, but it gets more wear than was intended, if that makes sense.
Post Posted: Wed Mar 23, 2011 9:36 am
 Subject: Right

To do the job right, you need three bearings. Two for the wheel, one for the sprocket carrier. The kit I used, I have no idea where it came from, was listed for the EX250F in my mechanic's catalog.

The sprocket carrier bearing is actually more likely to fail than the others IMHO, since it is -- seriously -- an OPEN bearing. This means the only thing keep the grease from getting washed out when you ride in the wet is .. grease! How often do you re-pack that sucker? I used to repack it every time I changed my tires; turns out that wasn't often enough.

Post Posted: Wed Mar 23, 2011 3:59 pm
 Subject: Reply from All Balls

I e-mailed All Balls last night stating I have a 1996 Kawasaki Ninja (EX) 250 and asked if they had a kit that included a bearing for the sprocket carrier.

This morning I checked my e-mail and they had already replied. "We do have a kit which includes 3 bearings and 1 seal. Part # is 25-1234".

So, there IS a kit out there, and All Balls staff was VERY fast in answering my question.

Bokonon - maybe include this data point in the FAQ bearing replacement article?
Post Posted: Wed Mar 23, 2011 4:03 pm
 Subject: do you have a link to their site and that kit? Thanks.

Post Posted: Wed Mar 23, 2011 4:25 pm
 Subject: All Balls site and sources

The home site for All Balls is: I have to say, I was very pleased with their prompt reply.

If you use their search function, the same part number comes up! (I'm excited because you would not believe how many sites are not internally consistent with parts numbers....)

Of course, if you know the part number, you can check for parts availability at many vendors, including via -
Post Posted: Wed Mar 23, 2011 4:43 pm
 Subject: What's the seal for?; Aren't those double-sealed bearings? Wes

Post Posted: Wed Mar 23, 2011 4:46 pm
 Subject: bearings...

I replaced the bearings on finace's bike shortly after I bought it a few months back. The rear bearings were notchy, the front were ok, but I swapped them anyway.

Cheapest place I found them was at

x2: $1.25 6202-2RS

x1: $1.75 6203-2RS
x1: $3.95 6303-2RS
x1: $4.95 6305-2RS (sprocket carrier)

Bought a TUSK bearing puller (has a slide hammer) from RockyMtnATV which made the job a breeze. (Apparently it's known as a blind bearing puller. Might be able to find something cheaper searching for that?)

Motion pro makes this cheaper bearing remover, but you have the access the bearing from the other side and pound it out with the tool. The side hammer version is more useful for other things (such as removing a pilot bearing for the input shaft of a MTX in an automotive flywheel) so I spent a little more for it.
Post Posted: Wed Mar 23, 2011 4:52 pm
 Subject: that single seal

I'm thinking its a replacement for the seal that is found over the snap ring on the brake rotor side?

Part number 92049 on the parts fiche.

The sides of the bearing behind the snap ring is the only spot I have discovered any trace of rust, so I'm betting its there to help prevent water from getting into that area.
Post Posted: Wed Mar 23, 2011 6:15 pm
 Subject: Interesting! Please let us know!

Post Posted: Wed Mar 23, 2011 11:20 pm
 Subject: +1 Let me know when you install and I'll add it.

Powered by phpBB © 2001, 2005 phpBB Group