Rocker Arm Shim - Page 3

Byron1 · 11-16-2012, 01:07 PM

It's a bit of a "how long is a piece of string" question, but in your collective experience, how long should I expect the needle bearings to last? Bike has a full service history, regular oil changes, I have never really ridden it hard... For long anyway.

Also what would be the typical signs of them approaching the end of their life?

I have a r100rs 79 with about 81k miles on the clock.. It has the plastic spacers at the end of the rocker arms so I assume at some point the original ones were changed. (basing that assumption on what I am reading above)..

I suppose what I am getting at, is should I consider replacing them as a maintenance task or should I just leave alone?

Apologies to hijack the thread but you all got me thinking...

Thanks,

Byron

supershaft · 11-16-2012, 01:18 PM

How long do they last? It's all over the map. Keeping the endplay at a minimum helps but it is not a cure all. I don't worry about them but I check them every time I have the rocker arms off for some reason. I replace them all when I am doing a valve job. I replaced them all when I put my sport cam in 70k miles ago and again now that I just got a valve job. I had one break this last time I checked at 70k miles. It got into the shaft a bit too.

11-16-2012, 01:07 PM	#31
Byron1 Adventurer Joined: Jul 2012 Location: On the move Oddometer: 83	It's a bit of a "how long is a piece of string" question, but in your collective experience, how long should I expect the needle bearings to last? Bike has a full service history, regular oil changes, I have never really ridden it hard... For long anyway. Also what would be the typical signs of them approaching the end of their life? I have a r100rs 79 with about 81k miles on the clock.. It has the plastic spacers at the end of the rocker arms so I assume at some point the original ones were changed. (basing that assumption on what I am reading above).. I suppose what I am getting at, is should I consider replacing them as a maintenance task or should I just leave alone? Apologies to hijack the thread but you all got me thinking... Thanks, Byron __________________ http://www.travelblog.org/Bloggers/A...he-flying-aga/

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11-16-2012, 01:18 PM	#32
supershaft because I can Joined: Sep 2010 Location: San Francisco Bay area Oddometer: 6,043	How long do they last? It's all over the map. Keeping the endplay at a minimum helps but it is not a cure all. I don't worry about them but I check them every time I have the rocker arms off for some reason. I replace them all when I am doing a valve job. I replaced them all when I put my sport cam in 70k miles ago and again now that I just got a valve job. I had one break this last time I checked at 70k miles. It got into the shaft a bit too.