KOYO bearings

[kg993]

Has anyone ever installed a KOYO #GB2610 Harley#8906 in the 82 thru 85 4 speed big twin transmission? Torrington stopped making this #. I installed one last week and was too tight for the gear fit. Ordered another one that came in today and the same problem.
I found the recommended case and gear dimensions when working with the first bearing and all is on the mark. Left a message with KOYO and hope they will call back tomorrow.

[Robert Luland]

Kerry, Lets start at the beginning. Are we talking about 1. Fit in case? 2. Shaft in bearing or 3. Length of bearing, meaning is the bearing protruding into the tranny out of the hole in the case. Did you mic this to the original? The bearings are industry standard so this type of thing doesn't happen but who knows what happens in China after munching down your tainted KFC breakfast? I want to work with you on this one. You have definitely got my interest on this. Bob L

[kg993]

The trans case in 82-up has a steel bushing. That measures in spec. with dimensions I got from the local bearing supply. Also I have three 4th. gears that all measure in spec. two used and one new Andrews. Each one is 1 ten thousandth different in size, the new one is largest.
The bearing fits fine in the case, width is not an issue. The gear will not go into the bearing after installation. I found a tool that is .001" smaller than the gear surface and it almost will go in.
I talked to the tech at KOYO this morning and was completely astonished by his arrogance. He claimed there is no record of KOYO making that bearing and led me around in circles telling me all the companies including H.D. that I need to contact.
When I finally demanded he send me to another branch at KOYO a woman immediately found the # and also her next question was about designation B and GB, did I have the right one. A very intelligent person I have to say. Unfortunately while she was transfering me to another line I was disconected without her contact #. Maybe tomorrow I'll calm down enough to call Jason, their tech back to get connected to the other line. Sorry for the rant but I feel better now.

[kg993]

The trans case in 82-up has a steel bushing. That measures in spec. with dimensions I got from the local bearing supply. Also I have three 4th. gears that all measure in spec. two used and one new Andrews. Each one is 1 ten thousandth different in size, the new one is largest.
The bearing fits fine in the case, width is not an issue. The gear will not go into the bearing after installation. I found a tool that is .001" smaller than the gear surface and it almost will go in.
I talked to the tech at KOYO this morning and was completely astonished by his arrogance. He claimed there is no record of KOYO making that bearing and led me around in circles telling me all the companies including H.D. that I need to contact.
When I finally demanded he send me to another branch at KOYO a woman immediately found the # and also her next question was about designation B and GB, did I have the right one. A very intelligent person I have to say. Unfortunately while she was transfering me to another line I was disconected without her contact #. Maybe tomorrow I'll calm down enough to call Jason, their tech back to get connected to the other line. Sorry for the rant but I feel better now.

[kg993]

The screen said to wait 15 seconds and try again to post. Now there's two, O-well.

[fillibuster]

Kerry, Lets start at the beginning. Are we talking about 1. Fit in case? 2. Shaft in bearing or 3. Length of bearing, meaning is the bearing protruding into the tranny out of the hole in the case. Did you mic this to the original? The bearings are industry standard so this type of thing doesn't happen but who knows what happens in China after munching down your tainted KFC breakfast? I want to work with you on this one. You have definitely got my interest on this. Bob L

"after munching down your tainted KFC breakfast? "" chicken and waffles? .. now I'm concerned.

[Limey_Dave]

Torrington has been part of Koyo since around 2010.The bearings are still made the same as far as I know,and still marked with the Torrington number,but sold in a Koyo box.This applies also to the B148 etc bearings as fitted as upgraded cam bearings in Evo and TC engines,the OE are INA,and prone to failure.
Some GB bearings have a B version where the tollerances are slacker,but I don't think theres a version of the GB2610.
As this is a cageless bearing,are you sure the rollers aren't tipped out of place?
Does the gear fit with the bearing out of the case?

[duffeycycles]

The problem is the Koyo idiots..They are marking B2610 bearings with the GB2610 marking also
Vtwin#12-0300=HD #8905=Late '77-'81 4speed main drive gear BRNG B2610
Vtwin#12-0349=HD#8906='82-85.........4speed " " " " GB2610
8905 OD is slightly larger than 8906
If you press it in to '82-'85 box it is tighter but will press in. If you push the gear in with hand it scratches the Main drive gear and locks up before you go very far
VTwin gets them from Eastern who gets them from the Idiots at Koyo
The only way I can see to use the B2610 in the '82-'85 box is to lap the Race like you would oversize bearings in earlier 4speeds--but how far????
Koyo crap1.jpgKoyo crap2.jpgKoyo crap3.jpg
Both pics same bearing
Races not available for replacement

[duffeycycles]

Disregard last post, the Koyo bearing pressed right in and the gear fits
This pic is the VTwin/Eastern made in USA bearings that I had a problem with
too many bearings in front of me has messed with my recent frontal labotomy!
on the right is the original Timken
very hard to measure as the outer edges are different OD than the middle
Eastern- Torrington.jpg
Stay away from the EASTERN/VTWIN bearing as shown on left