rear wheel differences in wheel bearing location

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dmsantam
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rear wheel differences in wheel bearing location

Postby dmsantam » Tue Nov 07, 2017 5:45 pm

A couple of months ago, a set of wheels became available locally very cheap from a 2003 model, and I bought them. My rear tyre is nearly worn, so I thought I would change to the new wheel, which has a good tyre on it. When I went to torque the axle nut, the other side of the axle pulled through too far... very strange. I tried my normal wheel, no problem.

Upon closer inspection, I noticed that the wheel bearings on the shaft drive side are further "in" the wheel.

my original wheel pic:
https://photos.app.goo.gl/yckpzPdf6MWiZgCl2

new wheel pic:
https://photos.app.goo.gl/TA2LIYqrX5Rs6TQB3

What is going on here? Is this something to do with ABS? is there some way I can use this wheel, with a spacer perhaps? My bike does not have ABS.

cheers,

Dan
Last edited by dmsantam on Wed Nov 08, 2017 7:37 am, edited 1 time in total.
Dan, from Sydney
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dmsantam
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Re: rear wheel differences in wheel bearing location

Postby dmsantam » Tue Nov 07, 2017 5:52 pm

http://www.fjrtech.net/getdbitem.cfm?item=36

Looking at the pics there, it looks like the bearing is further in. is the 2001 model different? there are a couple of little things that are different... but this would mean the swingarm or spacer sizes have to be different.
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Re: rear wheel differences in wheel bearing location

Postby Diversion » Wed Nov 08, 2017 12:00 am

dmsantam wrote:http://www.fjrtech.net/getdbitem.cfm?item=36

Looking at the pics there, it looks like the bearing is further in. is the 2001 model different? there are a couple of little things that are different... but this would mean the swingarm or spacer sizes have to be different.

The swing arms are the only difference between gen one and two. ABS and no ABS should not be any different either but I could be wrong.
But I think you may have a spacer stuck in one wheel that you can swap.
By the way the links to the pictures didn’t work.
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Re: rear wheel differences in wheel bearing location

Postby john foley » Wed Nov 08, 2017 7:17 am

HI Look up the part numbers on the two bikes see if they are the same or different. TT

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Re: rear wheel differences in wheel bearing location

Postby dmsantam » Wed Nov 08, 2017 7:39 am

Diversion wrote:
dmsantam wrote:http://www.fjrtech.net/getdbitem.cfm?item=36

Looking at the pics there, it looks like the bearing is further in. is the 2001 model different? there are a couple of little things that are different... but this would mean the swingarm or spacer sizes have to be different.

The swing arms are the only difference between gen one and two. ABS and no ABS should not be any different either but I could be wrong.
But I think you may have a spacer stuck in one wheel that you can swap.
By the way the links to the pictures didn’t work.


Pics fixed.

The two wheels are both Gen1. But the original is 2001 model, and the "new" one is 2003 model.

I think you're right that the only difference is the centre spacer. I don't really want to swap the spacer, because I want wheels that I can easily swap back and forth with. I will look up the parts fiche and see if the spacer is different.

cheers
Dan, from Sydney
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Re: rear wheel differences in wheel bearing location

Postby dmsantam » Wed Nov 08, 2017 9:12 am

I did a lot more measuring of everything, and the wheel and hub itself is definitely identical. I then went through the parts diagram, and found only 2 (relevant) part numbers that were different.

parts diagram picture:
https://photos.app.goo.gl/L0Jige291i4VvRO52

1. The bearing in the centre of the hub - item 6 in the picture
2. The bearing on the shaft side of the hub - item 10 in the picture

The spacer is identical. I will have a closer look at the wheels this evening (I am at work at the moment). A forum member in the states suggested that there is a double bearing arrangement in the earlier model -
perhaps it is only an extra bearing on the shaft side.

My aim is to have a second wheelset on hand at all times, without the need to swap any other parts between wheels. It sounds like I will just need to purchase a rear wheel bearing set at this stage, as a worst case. In the best scenario, perhaps I can add a shaft side wheel bearing - the space available seems to be exactly the width of a wheel bearing, but I have not yet measured.

I also found some comments indicating a dual bearing setup on 2001 models here:
http://www.fjrowners...s/35/15173.html

Thanks for the comments so far. I think I'm getting somewhere.
Dan, from Sydney
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Re: rear wheel differences in wheel bearing location

Postby dmsantam » Wed Nov 08, 2017 6:43 pm

So i put in another 6204 bearing, and it was then identical to my other wheel! Installed it, and took it for a ride - no problems. I find it surprising that there are two 6204 bearings there on the shaft side... that's serious overkill for a motorcycle if you ask me. But im not complaining.

I wonder why they decided to remove that second bearing in later models.
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Re: rear wheel differences in wheel bearing location

Postby Diversion » Wed Nov 08, 2017 11:30 pm

Trust Yamaha to be frugal where it counts :grin:
I’m betting that there is some part on the very latest model that came from the very earliest bike Yamaha ever made.
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Re: rear wheel differences in wheel bearing location

Postby AHAMAY » Thu Nov 09, 2017 6:43 am

Diversion wrote:I’m betting that there is some part on the very latest model that came from the very earliest bike Yamaha ever made.

A reed valve? :dance:
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Re: rear wheel differences in wheel bearing location

Postby Diversion » Thu Nov 09, 2017 2:53 pm

AHAMAY wrote:
Diversion wrote:I’m betting that there is some part on the very latest model that came from the very earliest bike Yamaha ever made.

A reed valve? :dance:



The differentials and the seat latches are two parts that are used on other earlier bikes but there may be some totally un altered part that Yamaha made that will fit any of their bikes, excluding light globes and tyre valves of course.
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