ADVrider

Go Back   ADVrider > Bikes > GSpot > Parallel Universe
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 10-21-2009, 04:03 PM   #661
DockingPilot
Hooked Up and Hard Over
 
DockingPilot's Avatar
 
Joined: Mar 2004
Location: Andover, N.J.
Oddometer: 9,027
Quote:
Originally Posted by YetiGS
I assume you mean just the new wheel, not the whole damn bike. You and I both have far to many "upgrades" to our bikes to trade them in at this point.

You got that right !
__________________
Frank Reinbold

"Every bike I ever had, was the best bike I ever had, when I had it"
DockingPilot is offline   Reply With Quote
Old 10-21-2009, 06:37 PM   #662
classyfun
Adventurer
 
Joined: Nov 2008
Location: Just about center of Arizona
Oddometer: 34
Question Bearing Size

I asked this on Woody's Thread but never heard back. Would it be possible to spec a new bearing with a smaller circumference? It seams logical to do this and would be easier than honing a wheel hub.

I do not have a lot of expertise to research it but if someone has the required specs I would sure try.

Thanks everyone for your attention to this matter. I am not affected yet but soon will be from all the reports.

Quote:
Originally Posted by LaPorte
I read somewhere that all five wheel bearings (two in the front wheel and three in the rear wheel) are 6204's. Is this true. If it is, I was woundering what the bore size is on the front wheel hub? Front bearings don't seem to be having any trouble. Last time i looked, the front wheel does the same miles as the rear wheel?
classyfun is offline   Reply With Quote
Old 10-21-2009, 06:46 PM   #663
YetiGS
No Talent Ass Clown
 
YetiGS's Avatar
 
Joined: Apr 2007
Location: San Diego
Oddometer: 7,316
One potential problem I see is that people who have changed their bearings report that they go in fine halfway and then get tight. This suggests to me that the hub is tapered, i.e the bearing seats are not parallel. If that's the case, using a smaller bearing won't help.

Speaking of which, I wonder if Woody measured the diameter of the hub at the top, middle and bottom of the hole? Anyone know?
Quote:
Originally Posted by classyfun
I asked this on Woody's Thread but never heard back. Would it be possible to spec a new bearing with a smaller circumference? It seams logical to do this and would be easier than honing a wheel hub.

I do not have a lot of expertise to research it but if someone has the required specs I would sure try.

Thanks everyone for your attention to this matter. I am not affected yet but soon will be from all the reports.
__________________
-Scott-
Semper Fi
'04 BMW R1150GSA, '04 KTM 625 SXC
"You had better bring an extra magazine. Yeti's amped up on weird shit are hard to bring down." Lonestar2112
YetiGS is offline   Reply With Quote
Old 10-21-2009, 07:43 PM   #664
LaPorte
Gnarly Adventurer
 
LaPorte's Avatar
 
Joined: Jul 2006
Location: Northern Ca.
Oddometer: 464
Bearing drops in

Yetigs

On one of the posted pictures showing the disc side of the hub without the bearing, I think it was the one Woody posted, it shows about half way down the bore you can see a very small lip, a slight differnt in diameter of the hub (smaller) this is where the bearing stops when it's droped in. You can see the lip, the bearing stops at the lip, then needs to be pressed/tapped in passed this point to the bearing seat. The larger bore allows the bearing to be droped into the bore and not be cocked. I think the first part of the bore is 47mm because that's the OD of the seal. The smaller part of the bore is the part in question. What should it be? Woody gave some mesurements that he got when he measure the hub. I don't know what the correct bore should be.
http://www.advrider.com/forums/showp...1&postcount=15

??????????????????????????????????????????

LP
__________________
If you don't know where your going don't lead!

LaPorte screwed with this post 10-21-2009 at 07:55 PM
LaPorte is offline   Reply With Quote
Old 10-22-2009, 08:20 AM   #665
LaPorte
Gnarly Adventurer
 
LaPorte's Avatar
 
Joined: Jul 2006
Location: Northern Ca.
Oddometer: 464
Ball Bering Clearence chart

Radial Internal Clearance for Ball Bearings

Radial internal clearance provides for thermal expansion and slight misalignment of the inner and outer rings. Internal clearances for ball bearing units are typically greater than those of the same size of radial ball bearings. Proper internal clearance is important for optimal bearing life. Below are the most common clearance classifications for cylindrical bore insert bearings.
RADIAL INTERNAL CLEARANCE FOR CYLINDRICAL BORE BEARINGS

Bore Diameter
d
C2 -
Less than standard
C0 -
Standard

C3 -
Greater than Standard
C4 -
Greater than
C3
MillimeterInchesC L E A R A N C E INCHES
OverInc.OverInc.LowHighLowHighLowHighLowHigh

2.5
0.984
.00024.0001.0004.0004.0007

2.5100.984.3937
.00028.0001.0005.0003.0009.0006.0011
1018.3937.7087
.00035.0001.0007.0004.0010.0007.0013
1824.7087.9449
.00039.0002.0008.0005.0011.0008.0014
2430.94491.1811
.00043.0002.0008.0005.0011.0009.0016
30401.18111.5748
.00043.0002.0008.0006.0013.0011.0018
40501.57481.9685
.00043.00025.0009.0007.0014.0012.0020
50651.96852.5591
.00059.00035.0011.0009.0017.0015.0024
65802.55913.1496
.00059.0004.0012.0010.0020.0018.0028
801003.14963.9370
.00071.00045.0014.0012.0023.0021.0033
1001203.93704.7244
.00079.0006.0016.0014.0026.0024.0038
1201404.72445.5118
.00091.0007.0019.0016.0032.0028.0045
1401605.51186.2992
.00091.0007.0021.0018.0036.0032.0051
1601806.29927.0866
.00098.0008.0024.0021.0040.0036.0058
1802007.08667.8740
.00118.0010.0028.0025.0046.0042.0064
__________________
If you don't know where your going don't lead!
LaPorte is offline   Reply With Quote
Old 10-22-2009, 10:38 AM   #666
wscollay
Adventurer
 
Joined: Feb 2009
Location: San Luis Obispo CA
Oddometer: 39
C3

My replacement SKF 6204 bearings are C3. Could one then use a CO or C2 that are smaller.

wscollay screwed with this post 10-22-2009 at 10:52 AM
wscollay is offline   Reply With Quote
Old 10-22-2009, 11:10 AM   #667
LaPorte
Gnarly Adventurer
 
LaPorte's Avatar
 
Joined: Jul 2006
Location: Northern Ca.
Oddometer: 464
6204-2RS-C3 bearings

wscollay

I don't want to put out bad news, but. The SKF bearing engineer I spoke with, told me, that if the bore is 46.44mm, as indicated by Woody's post when he measured a f 800 GS rear wheel hub, it would still be to tight for even a C5 class bearing. The difference in free space between C3 and C4 class bearings is 20 to 30 microns as it is between a C4 and a C5 bearing.
Look at the chart and do some math and you will see what Woody said is right on the money.
Lst's hope that the powers to be will recognize this as a problem and correct it soon if thay already haven't done so.

LP
__________________
If you don't know where your going don't lead!
LaPorte is offline   Reply With Quote
Old 10-22-2009, 11:45 AM   #668
Lion BR
I'd rather be riding
 
Lion BR's Avatar
 
Joined: Oct 2005
Location: Oregon
Oddometer: 3,408
Now that we've been through this route of discovery of possible reasons for premature bearing failure on these bikes, you could only assume the hub designer/manufacturer should have to know about all of this, right? This is what they are paid to do. This is their living. So, who designed, and who makes those rear wheel hubs?
Lion


Quote:
Originally Posted by LaPorte
wscollay

I don't want to put out bad news, but. The SKF bearing engineer I spoke with, told me, that if the bore is 46.44mm, as indicated by Woody's post when he measured a f 800 GS rear wheel hub, it would still be to tight for even a C5 class bearing. The difference in free space between C3 and C4 class bearings is 20 to 30 microns as it is between a C4 and a C5 bearing.
Look at the chart and do some math and you will see what Woody said is right on the money.
Lst's hope that the powers to be will recognize this as a problem and correct it soon if thay already haven't done so.

LP
Lion BR is offline   Reply With Quote
Old 10-22-2009, 01:19 PM   #669
RedHawk47
Adventurer
 
RedHawk47's Avatar
 
Joined: Oct 2006
Location: Berthoud, CO
Oddometer: 373
Quote:
Originally Posted by wscollay
My replacement SKF 6204 bearings are C3. Could one then use a CO or C2 that are smaller.
C0 and C2 bearings have the same OD as C3 and C4.
The difference is the internal clearances (between the balls, inner race and outer race. The reason to consider C3 or C4 is that a smaller than standard hub bore will compress the bearing outer race and reduce the internal clearance.
__________________
Dan
It's never too late to have a happy childhood. -- Tom Robbins
13 Moto Guzzi Stelvio NTX
09 BMW F800GS
99 KLR 650 A13
RedHawk47 is offline   Reply With Quote
Old 10-22-2009, 01:29 PM   #670
RedHawk47
Adventurer
 
RedHawk47's Avatar
 
Joined: Oct 2006
Location: Berthoud, CO
Oddometer: 373
Quote:
Originally Posted by LaPorte
wscollay

I don't want to put out bad news, but. The SKF bearing engineer I spoke with, told me, that if the bore is 46.44mm, as indicated by Woody's post when he measured a f 800 GS rear wheel hub, it would still be to tight for even a C5 class bearing. The difference in free space between C3 and C4 class bearings is 20 to 30 microns as it is between a C4 and a C5 bearing.
Look at the chart and do some math and you will see what Woody said is right on the money.
LP
I think Woody had a "typo" because the results of the math - the measured interferance - was as if he had measured the bore at 46.94mm. Looking at the photo of his micrometer I read 46.94.
46.44 >> 0.56mm is .022" - you would be able to get the bearing into a bore that much smaller.
__________________
Dan
It's never too late to have a happy childhood. -- Tom Robbins
13 Moto Guzzi Stelvio NTX
09 BMW F800GS
99 KLR 650 A13
RedHawk47 is offline   Reply With Quote
Old 10-22-2009, 03:33 PM   #671
Lion BR
I'd rather be riding
 
Lion BR's Avatar
 
Joined: Oct 2005
Location: Oregon
Oddometer: 3,408
Did you mean:

Quote:
Originally Posted by RedHawk47
I think Woody had a "typo" because the results of the math - the measured interferance - was as if he had measured the bore at 46.94mm. Looking at the photo of his micrometer I read 46.94.
46.44 >> 0.56mm is .022" - you would NOT be able to get the bearing into a bore that much smaller.
?
Lion BR is offline   Reply With Quote
Old 10-22-2009, 05:28 PM   #672
]I)Money
D NOT I
 
]I)Money's Avatar
 
Joined: Mar 2006
Location: Central central.
Oddometer: 3,452
Quote:
Originally Posted by RedHawk47
I think Woody had a "typo" because the results of the math - the measured interferance - was as if he had measured the bore at 46.94mm. Looking at the photo of his micrometer I read 46.94.
46.44 >> 0.56mm is .022" - you would be able to get the bearing into a bore that much smaller.

__________________
Quote:
Originally Posted by wxwax
Yes, but everything you've ever posted in the basement indicates that you're certifiably crazy, so you don't count.

"Another road remains, but it provides no more. It can only take us away"
]I)Money is offline   Reply With Quote
Old 10-22-2009, 09:52 PM   #673
mapuda
Crash Tested
 
mapuda's Avatar
 
Joined: Apr 2007
Location: Las Vegas, NV
Oddometer: 261
Complaint Filed

I filed a complaint with NHTSA. We will see what happens.
Attached Images
 
mapuda is offline   Reply With Quote
Old 10-22-2009, 09:57 PM   #674
mapuda
Crash Tested
 
mapuda's Avatar
 
Joined: Apr 2007
Location: Las Vegas, NV
Oddometer: 261
Pissed Shoot proof read better!

The bearing does not run the wheel turns. And "for which" Arggh
mapuda is offline   Reply With Quote
Old 10-22-2009, 10:23 PM   #675
RobStar
Still On Training Wheels
 
Joined: Feb 2009
Location: Las Vegas Baby!
Oddometer: 433
My warranty repair was delayed by a day due to shipping but I've got my bike back and a fresh new TKC80 on the rear to start wearing down.

I'll probably pull the wheel and check the new bearing in a few thousand miles and again when it's time for new tires.

Forget the math... get'ur dun and go ride your bikes!

RobStar
__________________
Robert
Las Vegas

2010 1200GS Adventure
RobStar is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


Times are GMT -7.   It's 12:45 AM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014