Triumph roller bearing????? - The Jockey Journal Board

Go Back   The Jockey Journal Board > General Discussion > The Board

Reply
 
Thread Tools Search this Thread Display Modes
Old 02-09-2017, 04:58 AM   #1
MARIO MEDEIROS
Senior Member
 
Join Date: Feb 2006
Location: caledon ontario
Posts: 315
Default Triumph roller bearing?????

Went to order my new bearings for my 1970 650 tiger and found a note on catalogue about the different size bearings mine has a # RMS11 v3,does that mean I need the "C3" bearing? Was told what ever came out of the bike to make sure I put that bearing back in.Walridge where I get my parts say my bike should use the "C2" bearing but the "c3" is also offered.What is the difference? Just want to make sure I get the right one.Is there something for me to measure that will tell me which bearing to order?I can tell someone at one time was in this motor,now I did have it on the road last year and it ran great ,no noise or smoke at all just opened it up to do the trap.Thanks

Last edited by MARIO MEDEIROS; 02-09-2017 at 05:59 AM.
MARIO MEDEIROS is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 02-09-2017, 05:55 AM   #2
Truckedup
Senior Member
 
Join Date: Aug 2011
Location: Finger Lakes
Posts: 900
Default Re: Triumph roller bearing?????

It's slightly complicated....First link describes bearing internal clearance ,Cn, C2 etc.

http://www.skf.com/caribbean/product...nce/index.html

Here's a link from Brit Bike with more info....Some guys don't know about t bearing fit...Sometimes it doesn't matter because luck is on your side. But other times the wrong bearing causes funny noises and excessive engine vibration...

http://www.britbike.com/forums/ubbth...rue#Post567012

More..
http://www.britbike.com/forums/ubbth...rue#Post225303
__________________
I ride junk,some of it is fast
Truckedup is offline   Reply With Quote
Old 02-09-2017, 07:18 AM   #3
richbob
Senior Member
 
richbob's Avatar
 
Join Date: Sep 2011
Location: Atlantic coast.
Posts: 2,368
Default Re: Triumph roller bearing?????

well i just read all those links
and if motor was good before?
i reckon you want to put same bearing back in.
(Or buy one of each and test?)
__________________
Rush Rush to the Yayo. Blondie

"Ultimately were all dead men"(Oliver Reed.Gladiator)

Last edited by richbob; 02-09-2017 at 07:20 AM. Reason: info
richbob is offline   Reply With Quote
 
Old 02-09-2017, 10:51 AM   #4
Truckedup
Senior Member
 
Join Date: Aug 2011
Location: Finger Lakes
Posts: 900
Default Re: Triumph roller bearing?????

Quote:
Originally Posted by richbob View Post
well i just read all those links
and if motor was good before?
i reckon you want to put same bearing back in.
(Or buy one of each and test?)
Yes...If the bearing still fits onto the crank without slop ,in reality it may not be exactly a press fit....Then use the bearing type that came out. It's very important to make sure the nuts securing the bearing on the timing side and the one securing the alternator rotor on the drive side on torqued properly..
If the bearing fit on the crank is just a touch sloppy, like .0005, then a bearing with less internal clearance might be better...
There are also many posts on Brit Bike about creating problems when trying to secure a loose bearing with Loctite...
__________________
I ride junk,some of it is fast
Truckedup is offline   Reply With Quote
Old 02-09-2017, 11:19 AM   #5
MARIO MEDEIROS
Senior Member
 
Join Date: Feb 2006
Location: caledon ontario
Posts: 315
Default Re: Triumph roller bearing?????

Thanks to the replies but can anyone tell me what is my bearing a c2 or c3 ? Number on side says RMS11 V3
MARIO MEDEIROS is offline   Reply With Quote
Old 02-09-2017, 12:03 PM   #6
richbob
Senior Member
 
richbob's Avatar
 
Join Date: Sep 2011
Location: Atlantic coast.
Posts: 2,368
Default Re: Triumph roller bearing?????

look at last link
and post 225451 by kommando
__________________
Rush Rush to the Yayo. Blondie

"Ultimately were all dead men"(Oliver Reed.Gladiator)
richbob is offline   Reply With Quote
Old 02-09-2017, 01:49 PM   #7
MARIO MEDEIROS
Senior Member
 
Join Date: Feb 2006
Location: caledon ontario
Posts: 315
Default Re: Triumph roller bearing?????

But....I have none of those markings? am I missing something?
MARIO MEDEIROS is offline   Reply With Quote
Old 02-09-2017, 07:43 PM   #8
HayMike
Junior Member
 
Join Date: Mar 2010
Location: Near Akron, Ohio
Posts: 26
Default Re: Triumph roller bearing?????

V3 =C3 My 69 had C3 on both sides.
HayMike is offline   Reply With Quote
Old 02-10-2017, 05:59 AM   #9
MARIO MEDEIROS
Senior Member
 
Join Date: Feb 2006
Location: caledon ontario
Posts: 315
Default Re: Triumph roller bearing?????

Thanks will order the c3 as that is what was in it,but........all the suppliers seem to recommend the c2,could the guy before me have put in a c3 by mistake?or would that have caused noise and vibration because I was riding the bike last year and it did run great.Might be a little paranoid but I am hoping to do the bottom end only once.Thanks guys.
MARIO MEDEIROS is offline   Reply With Quote
Old 02-10-2017, 07:43 AM   #10
Rob Axel
Senior Member
 
Rob Axel's Avatar
 
Join Date: Aug 2007
Location: Savanah Ga.
Posts: 1,596
Default Re: Triumph roller bearing?????

^^^ good point^^^
These motors have been around for years and now telling how many sets of hands have been inside them ....or what has been done to them...
__________________
"The heart is happiest
When the head and the hand work together" - Jay Lenno
Rob Axel is offline   Reply With Quote
Old 02-10-2017, 07:58 AM   #11
bobscogin
Senior Member
 
Join Date: Nov 2007
Location: Lacombe, LA
Posts: 1,740
Default Re: Triumph roller bearing?????

Good info here: http://www.britbike.com/forums/ubbth...&Number=660036
Pay particular attention to John Healy's post for your answer.

Bob
bobscogin is offline   Reply With Quote
Old 02-10-2017, 09:12 AM   #12
MARIO MEDEIROS
Senior Member
 
Join Date: Feb 2006
Location: caledon ontario
Posts: 315
Default Re: Triumph roller bearing?????

So if I read that right a loose bearing like a c3 is better than a c2?More harm to be done if the bearing was a tighter fit?Just go ahead with reinstalling a new c3?
MARIO MEDEIROS is offline   Reply With Quote
Old 02-10-2017, 09:51 AM   #13
richbob
Senior Member
 
richbob's Avatar
 
Join Date: Sep 2011
Location: Atlantic coast.
Posts: 2,368
Default Re: Triumph roller bearing?????

C2 CN C3etc
read trucks posts is clear


Sent from Motorcycle.com Free App
__________________
Rush Rush to the Yayo. Blondie

"Ultimately were all dead men"(Oliver Reed.Gladiator)
richbob is offline   Reply With Quote
Old 02-10-2017, 06:31 PM   #14
MARIO MEDEIROS
Senior Member
 
Join Date: Feb 2006
Location: caledon ontario
Posts: 315
Default Re: Triumph roller bearing?????

Must be a bit of a retard I guess,still confused on the bearings,do I order a c3 like what was in there or try a c2? The c3 I have easily slides onto the crank is it a problem?Should I try a c2 which might be a tighter fit?Also on the timing side are there different size bearings for those or is it just the roller bearing?

Last edited by MARIO MEDEIROS; 02-10-2017 at 06:46 PM.
MARIO MEDEIROS is offline   Reply With Quote
Old 02-11-2017, 03:14 AM   #15
RidingHood
Senior Member
 
Join Date: Jun 2005
Location: Australia ACT
Posts: 1,127
Default Re: Triumph roller bearing?????

650 unit dead stock out of the factory the roller bearing is CN.

A C2 bearing will spell death to your engine its internal machined tolerance is too tight .Based on the brit bike discussion what John Healy was saying is that the alloy in triumph crankcases is behaving in an unusual manner as they get older, and actually increasing radial load on the bearing due to distortion of the hole the bearing fits in. So that is why on some bikes a C3 is used. (a C3 has a greater machined clearance in the bearing)
Bottom line if your bike spins freely with a CN ,you should be good

Last edited by RidingHood; 02-11-2017 at 03:58 AM. Reason: added "as they get older"
RidingHood is offline   Reply With Quote
Old 02-11-2017, 04:04 AM   #16
richbob
Senior Member
 
richbob's Avatar
 
Join Date: Sep 2011
Location: Atlantic coast.
Posts: 2,368
Default Re: Triumph roller bearing?????

According to what I read and it discusses some people's confusion.
It goes C2being smallest then CN then it goes C3,C4(gets larger)
Maybe this is where Mario is confused


Sent from Motorcycle.com Free App
__________________
Rush Rush to the Yayo. Blondie

"Ultimately were all dead men"(Oliver Reed.Gladiator)
richbob is offline   Reply With Quote
Old 02-11-2017, 07:57 AM   #17
MARIO MEDEIROS
Senior Member
 
Join Date: Feb 2006
Location: caledon ontario
Posts: 315
Default Re: Triumph roller bearing?????

Classic british spares say to use a cn and walridge motors say to use a c2 when I opened up my motor it has a c3.Getting to the crank for me a guy who has never opened up a motor before was a big job.I am hoping to only do this once which is why I am looking for advice.The c3 that was in there does slide onto the crank end very easy with the bearing on the crank if you turn the crank over the bearing will just fall off the shaft yet the bike ran great and I just want to replace both bearings just because.Buddy gave me a old bearing just to try and it goes on much tighter the the c3 on my buddys bearing it says MRU or might be MRJ 1 1/8 RHP A , anyone know what that is?If it is Triumph and if it is a CN,C2,C3 ect that might give me a heads up Thanks sorry also can't find anything about the timing side bearing did they also come in different sizes? 1970 650

Last edited by MARIO MEDEIROS; 02-11-2017 at 03:56 PM.
MARIO MEDEIROS is offline   Reply With Quote
Old 02-11-2017, 04:57 PM   #18
RidingHood
Senior Member
 
Join Date: Jun 2005
Location: Australia ACT
Posts: 1,127
Default Re: Triumph roller bearing?????

Okay bearing clearance goes like this
C1 less clearance than C2
C2 less clearance than CN
CN normal clearance
C3 more clearance than CN
C4 more clearance than C3
C5 more clearance than C4

Repeat: a C2 bearing according to John Healy who is incredibly knowledgeable on triumphs will give you trouble ,Period.The incredibly talented Phil Irving (RIP) John Healy and another Triumph wiz all agree Old motorcycle crankcases distort with age causing bearing housings to put more radial pressure on the bearing.To solve this you put a bearing in that has more internal clearance so in a triumphs case if a CN binds you use a C3. Just to repeat CN is the stock factory bearing for a 650 drive side
IF a bearing has no C# it is normal clearance (CN) so if your timing side bearing is just the bearing designation but no C#, a CN is what it is.
IF your bearing has the spot system of marking a bearing (my 750 bonnie has) ,this is what I found.
O is tight eg C2
OO is normal close to CN
OOO is loose and is C3
OOOO is even looser eg C4
Hope all this helps
RidingHood is offline   Reply With Quote
Old 02-12-2017, 06:08 AM   #19
Truckedup
Senior Member
 
Join Date: Aug 2011
Location: Finger Lakes
Posts: 900
Default Re: Triumph roller bearing?????

In my personal conversations with John Healy he told me to use a C2 drive side roller bearing if the inner race is a loose fit on the crankshaft...By loose I mean a easy slip fit rather than a snug fit... He also recommends CN drive side and C3 timing side in some situations ...
__________________
I ride junk,some of it is fast
Truckedup is offline   Reply With Quote
Old 02-12-2017, 02:12 PM   #20
RidingHood
Senior Member
 
Join Date: Jun 2005
Location: Australia ACT
Posts: 1,127
Default Re: Triumph roller bearing?????

Truckedup ,cant argue with that ,I just was clarifying what John said in some of those posts,he's a very clued up bloke.cheers
RidingHood is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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


All times are GMT -5. The time now is 09:27 PM.