Hi all

I have done a thorough search of this site, the Kawasaki service manual, and the parts fiche, and haven't yet found a description of the bearing sizes of the front wheel bearings, rear wheel bearings, and sprocket carrier bearings.

without the bearing sizes I can't order from anyone other that Kawasaki or one of the go fast tuners that has taken the trouble to determine the bearing sizes and put together a kit, which then restricts me to their kit.

has anyone determined what the bearing sizes are? If so, what are they? Thanks very much in advance.

I am thinking about going full ceramic bearings, ceramic races as well as ceramic balls, but I can't source or price suitable bearings until I know what sizes are required, and I am not yet ready to take my bike off the road to pull the bearings myself yet.

Paul

Rear wheel bearings = NTN 6205LU< Read off the bearing of my spare RR wheel... Or >6205UU Read off PartShark.com.
Rear sprocket carrier bearing = 6006G read off PartShark.
------------------------------------
Front wheel bearings 6005UU >Read off PartShark.

http://www.partshark.com/fiche_select2.asp?category=Motorcycles&make=Kawasaki&year=2008&fveh=24900

Lav, the above url is the parts page I bookmarked. The "LU" is what I can see written on the sealed cover that keeps the bearing clean and greased. But when I cross reference the letters, PartShark reads UU.

I have the front rim boxed up, so I had to rely on the parts page to come up with the 6005 number. If say the parts house has LU reading one dimension and UU reading another, then I would then carefully pull the dust seal out of the wheel so I can read the bearing number/letters.

If you're careful, you can reuse the dust seal if not distorted. Other than that, if the bearings match the PartShark numbers, you are good to go.

If you are going for big MPH, I'd leave the dust seals out. If this is half street/half race, then I'd install new dust seals with the ceramics.

thanks very much, Hub

I wasn't aware of the Parts Shark website, very useful.

with the three bearing numbers I am set to source new bearings from the best supplier I can find. Given the photos I have seen of salt encrusted bikes after running at Bonneville, I think I may go for something like the VV type of bearing seal, double non contact, but hopefully enough to keep the salt out of the bearings....

Paul

I am tired and going to bed, after looking at numerous bearing material possibilities. Various bearing constructions of the same size have different speed ratings, or limiting speeds.

so, my question to figure out when I am fresher is what rpm will a wheel bearing be spinning on a ZX 14 at 200 mph? Or maybe one of you reading this knows how to figure that out?

Paul

assuming a tire circuference on a Zx 14 of 1,953.4 mm (which I was using for gearing calculations), ,my question was what rpm a wheel bearing in that wheel would be turning at 200 mph.

1,953.4 mm is 76.9 inches.

76.9 inches is 0.0012 miles

so, for the wheel circumference of 0.0012 miles to travel 200 miles in an hour, it has to rotate 16,700 times in that hour.

to convert to revolutions per minute, divide 16,700 per hour by 60 minutes, so the wheel and wheel bearing will be spinning at 278.3 rpm?

anyone care to check and possibly (probably) correct my basic maths?

Paul

* Last updated by: laverda1200 on 11/17/2009 @ 1:47 PM *

Rear wheel bearings = NTN 6205LU< Read off the bearing of my spare RR wheel... Or >6205UU Read off PartShark.com.
Rear sprocket carrier bearing = 6006G read off PartShark.
------------------------------------
Front wheel bearings 6005UU >Read off PartShark.

It has been awhile since I installed the Ceramic bearings on my 07 Zx-14. But I thought .......
6205 X 2 = Rear
6206 X 2 = Front
6006 X 1 = cush

are you sure you are talking about an hour? That sounds more like a mintute's rate. so like 60 times that? sooooo
60X16,700= 1,002,000 rph?

I think i got it, the number seems more realistic at least lol...

i didn't measure the actual diameter of the wheel with the tire but used 19.5 inches figuring the tire itself will add about that much to the overall diameter...

1 mile = 63360 inches
tire circumference = 19.5 * 3.14= 61.23 in.
for the tire to travel one mile it has to rotate 63360/61.23 = 1034.78 times
-so to complete that one mile in 60 min it will rotate @ 1034.78/60min = 17.24 rpm
-knowing this i did a differential equation of 1mph/17.24 = 200mph/x rpm
i got x rpm to equal 3448 rpm???

i'm most likely wrong, but the number looks closer to real lol

i got x rpm to equal 3448 rpm???
i'm most likely wrong, but the number looks closer to real lol

wow