I need some help.. Final Drive

[heatmaker]

Can anyone help me identify this "seal"??





I am freshening up my ST 1300 and when I removed the rear wheel and got looking at the final drive this guy was floating around in there.

I found some pretty grimy ***** in the gear on the final drive and I am wondering if this remanence of a failed part # 31 in the fiche:



This was on the inside of the final gear and appears to seal around the distance spacer but it don't fit no more. LOL.

 

[heatmaker]

 

[TerryAir]

I'm sure there are others that will have more precise info, but the parts manual I have says that is indeed a "dust seal" (26x40x5) Honda part number 91268-463-003 and it appears to be the same number for all '07-'10 ST 1300's. (I have a 2008 ST1300 so I bought the '07-'10 parts manual, that part may be the same on earlier bikes..)

 

[Igofar]

I think you’re going to find out it’s a dust seal for one of the flange bearings.
I often find them floating around inside the pumpkins after the flange bearings have been replaced and folks leave damaged parts behind.
#91052-KZ4-J21
If you look close you may see the following on one side of it: 6905RS KOYO JAPAN 068

 

[heatmaker]

I think you’re going to find out it’s a dust seal for one of the flange bearings.
I often find them floating around inside the pumpkins after the flange bearings have been replaced and folks leave damaged parts behind.
#91052-KZ4-J21
If you look close you may see the following on one side of it: 6905RS KOYO JAPAN 068

OMG Thank you for the answers. Yes, that is exactly what it has stamped on it. Do you have any recommendations moving forward? Everything seems to be fine in the final drive. NO noises, no grinding, everything seems to work as it should....

Can I just assume it was left behind and discard it?

Thanks !

 

[dduelin]

Good call Larry.

To the OP, I would not put it back together until I checked the 2 driven flange bearings #18 by tapping out the collar #6 (remove the big circlip #17 and remove the entire splined hub assembly from the rear wheel. It can be stubborn to pull out but nothing but the circlip retains it). One or both of these two bearings can fail and not give any noise or grinding. These should always be checked when the rear wheel is off for a tire or other maintenance. However, they are hidden to some degree and failed bearings are often found when doing some other maintenance. If the dealer does not have them in stock they can be found at a good industrial bearing or power transmission wholesaler for about $10. The OEM 6905RS (single rubber seal) Honda part #91052-KZ4-J21 bearings can be replaced with 69052RS (both sides sealed), or plain 6905 (no seals) if the supplier doesn't the single seal RS style. Some owners like the single seal ones to repack w/grease from time to time. Several times I purchased them for myself or others at a supply house in order to get the bike back on the road that day.

 

[Igofar]

OMG Thank you for the answers. Yes, that is exactly what it has stamped on it. Do you have any recommendations moving forward? Everything seems to be fine in the final drive. NO noises, no grinding, everything seems to work as it should....

Can I just assume it was left behind and discard it?

Thanks !

Standing by....

 

[heatmaker]

Got it all checked air and cleaned up. The flange bearings looked and felt great.

thanks again for the assistance. I will probably ask for more help as I stumble through this thing.



Happy Thanksgiving!
Matt

 

[SMSW]

Got it all checked air and cleaned up. The flange bearings looked and felt great.

In your first post one of the pictures has an arrow pointing at the infamous splines - I think you called it a gear. You also mentioned you found some unmentionable gunk in there - which is really, or should be, Honda Moly Paste (not grease). I hope you cleaned the splines (wheel and final drive sides) and used the right moly on them. Consensus here is Loctite 8012 if you don't have the original Honda Moly 60.

 

[dduelin]

In your first post one of the pictures has an arrow pointing at the infamous splines - I think you called it a gear. You also mentioned you found some unmentionable gunk in there - which is really, or should be, Honda Moly Paste (not grease). I hope you cleaned the splines (wheel and final drive sides) and used the right moly on them. Consensus here is Loctite 8012 if you don't have the original Honda Moly 60.

Or Honda M-77 which Honda recommends for this application.

 

[heatmaker]

In your first post one of the pictures has an arrow pointing at the infamous splines - I think you called it a gear. You also mentioned you found some unmentionable gunk in there - which is really, or should be, Honda Moly Paste (not grease). I hope you cleaned the splines (wheel and final drive sides) and used the right moly on them. Consensus here is Loctite 8012 if you don't have the original Honda Moly 60.

Excellent advise. Thank you!

It’s in the cleaning process now and I have not yet put it all together. Waiting for the new rear tire.
I will be sure to follow the manuals recommendations on all lubricants and chemicals.

this will be a long project as I intend to go through the entire bike from rear to front through the winter.
Great to know that I have this community to lean on.

Matt