anyone know these sizes? there appears to be 2 roller bearings and a needle roller bearing too

tlnut wrote:anyone know these sizes? there appears to be 2 roller bearings and a needle roller bearing too

The double bearing is a Koyo 6908RS x2 (40. 62. 12) (it's two 12mm bearings (iirc) connected together by a plastic clip) - David Silvers usually carries this cheap, it's about 65gbp from Honda. 30gbp from DSS.

The needle roller i'm not sure on.

I gave up sourcing cheap Koyo bearings but brought it from DSS instead.

The needle bearing needs to be a Honda part mate, it has a built in seal part number 91071-MR7-003 about £50 though

cool will look into it, anyone know an easy way to take the c clips out of the hub?

Cir clip pliers.... you wanna worry more about getting the old bearing out, it's a c**t of a job!!!!

vfrderek wrote:Cir clip pliers.... you wanna worry more about getting the old bearing out, it's a c**t of a job!!!!

Last time I did one it was very very easy! (Think I was extreemly luck though!) as i've heard horror stories of rusted in bearings that have almost become part of the swinging arm!

Good sized drift and some heat if necessary might help!

Good luck! :-)

If you phone up David Silvers i'm sure they'll be able to give you all the prices and availablity pretty quickly

vfrderek wrote:The needle bearing needs to be a Honda part mate, it has a built in seal part number 91071-MR7-003 about £50 though

We differ on this, but I don't think the official Honda part is a necessity. The bearing fit is very close, and there's a dust seal too. I'll cut'n'paste my notes, below:

Rear wheel bearing, left, GBP24.00 inc vat (Wemoto)
40mmID x 62OD x 24mm Width, substitute 2 x 6908 2RS. FWIW, if you go to a bearing supplier you will have a choice; either an 6908LU made up of two separate races, or a bearing made of one larger race. I used the single larger race reasoning it would cool more efficiently.

Rear wheel bearing, right, GBP 33.19 inc vat (Wemoto)
50x62x25mm Needle bearing. They're a fairly stock size available from most bearing suppliers. Much less expensive than Honda part no. 91062-MR7-003. You will need a dust seal 50x62x5 to go with the bearing.

Buying the bearings is easy. Getting the bearings out of the hub is the tricky part.

tanto wrote:

vfrderek wrote:The needle bearing needs to be a Honda part mate, it has a built in seal part number 91071-MR7-003 about £50 though

We differ on this, but I don't think the official Honda part is a necessity. The bearing fit is very close, and there's a dust seal too. I'll cut'n'paste my notes, below:

Rear wheel bearing, left, GBP24.00 inc vat (Wemoto)
40mmID x 62OD x 24mm Width, substitute 2 x 6908 2RS. FWIW, if you go to a bearing supplier you will have a choice; either an 6908LU made up of two separate races, or a bearing made of one larger race. I used the single larger race reasoning it would cool more efficiently.

Rear wheel bearing, right, GBP 33.19 inc vat (Wemoto)
50x62x25mm Needle bearing. They're a fairly stock size available from most bearing suppliers. Much less expensive than Honda part no. 91062-MR7-003. You will need a dust seal 50x62x5 to go with the bearing.

Buying the bearings is easy. Getting the bearings out of the hub is the tricky part.

The 6908RS's from Honda are 12mm joined with a plastic clip. I see you just used a single 24mm bearing. Any theories or knowledge on why Honda used two bearings instead of one?

just been searching net bearing are a standard size so easy to get, forget honda's silly prices the big needle bearing is very common in industrial convayor belts. will source monday

Can you post the details of where to get them when you can