ADVrider

Go Back   ADVrider > Bikes > Old's Cool > Airheads
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 10-10-2012, 03:19 PM   #1
some_guy OP
Gnarly Adventurer
 
some_guy's Avatar
 
Joined: Sep 2012
Location: NoVa
Oddometer: 143
Rocker Arm Shim

So I did a valve adjustment last weekend on my 95 R100RT and noticed that one of my rocker arms had some vertical play. If I remember right this is probably what is causing that head to be noisy and could potentially trash the rocker arms or worse if the needle bearings come apart...anyone have any experience with this? How long can I ignore it? There were 2 shims already in place (part 11 below). Do you add shims or try to keep the number of shims low?



Thanks!
some_guy is offline   Reply With Quote
Old 10-10-2012, 03:47 PM   #2
JonnyCash
turd polisher
 
Joined: Jan 2011
Location: Midcoast, Maine
Oddometer: 1,269
They're available in different thicknesses, so instead of adding to the total number, you could just get thicker ones. That said, I cant see why it would really matter how you make up the thickness, but I would personally go for the least number of shims necessary to get end float where you want it.
__________________
I wouldn't bring her home to Mama, but Mama ain't home tonight.
JonnyCash is online now   Reply With Quote
Old 10-10-2012, 07:57 PM   #3
supershaft
because I can
 
Joined: Sep 2010
Location: San Francisco Bay area
Oddometer: 7,579
The needle bearing cages still break with no play there. I think it helps to have zero play but I know for sure that it doesn't stop needle bearing cages from breaking. You can adjust the play out exactly like you do on the earlier setups. You don't need any shims. I have adjusted them by squeezing in the blocks hundreds of times as have a number of other mechanics I know with no problems whatsoever. Besides, the shims don't come in enough sizes to get the end play as perfect as I like to get them. I use a modified Vise Grip C clamp. IMO it is THE best way to get the adjustment down to a gnat's ass.
supershaft is offline   Reply With Quote
Old 10-10-2012, 09:44 PM   #4
Wirespokes
Beemerholics Anonymous
 
Wirespokes's Avatar
 
Joined: Jul 2002
Location: Jackson's Bottom Oregon
Oddometer: 7,662
I tried that approach using a C clamp. However it loosened back up and added a shim instead.
__________________
Wanted: Dead, smashed, crashed or trashed gauges
BMW GAUGE REPAIRS - TACH*SPEEDO*CLOCK*VOLT METER *PODs & LIGHT BOARD*
Wirespokes is offline   Reply With Quote
Old 10-10-2012, 10:50 PM   #5
supershaft
because I can
 
Joined: Sep 2010
Location: San Francisco Bay area
Oddometer: 7,579
Quote:
Originally Posted by Wirespokes View Post
I tried that approach using a C clamp. However it loosened back up and added a shim instead.
Anything is possible. I don't know how sometimes but . . . .
supershaft is offline   Reply With Quote
Old 10-10-2012, 11:46 PM   #6
bmweuro
Mad Scientist
 
bmweuro's Avatar
 
Joined: Nov 2003
Location: Chico, California
Oddometer: 3,270
Quote:
Originally Posted by Wirespokes View Post
I tried that approach using a C clamp. However it loosened back up and added a shim instead.
A "C" clamp does not work with the late style rocker arms as the end blocks are located into the head and there is no movement. Stick a feeler gauge between the rocker block and rocker arm to figure out how much play you have. Take that number plus the thickness of the shims that are already there to figure out what combination of shims you need. I agree- the fewer the better/easier
__________________
BOXER Metal
BMW Biker Scum
BMW Mad Scientist!
VBMWMO #7770, BMW MOA #48694 & Airhead BMW Club #600
bmweuro is offline   Reply With Quote
Old 10-11-2012, 04:53 AM   #7
Bill Harris
Confirmed Curmudgeon
 
Bill Harris's Avatar
 
Joined: Sep 2008
Location: backwoods Alabama
Oddometer: 4,894
^^^ yep, what Chris sez ^^^
__________________
'73 R60/5 Toaster
Bill Harris is offline   Reply With Quote
Old 10-11-2012, 08:21 AM   #8
100RT
Gnarly Adventurer
 
100RT's Avatar
 
Joined: Nov 2009
Location: N. E. OHIO
Oddometer: 413
I believe the shims come in about 5 different sizes.
100RT is offline   Reply With Quote
Old 10-11-2012, 08:36 AM   #9
bmweuro
Mad Scientist
 
bmweuro's Avatar
 
Joined: Nov 2003
Location: Chico, California
Oddometer: 3,270
Quote:
Originally Posted by 100RT View Post
I believe the shims come in about 5 different sizes.
You are correct
0.20mm
0.25mm
0.30mm
0.35mm
0.50mm

I noticed the price on the 0.35 is over 3.00 while the rest are 73 cents. Buy 73 cent ones now before BMW raises the price to $3.57. This will happen when they have to reorder them from BMW AG.
__________________
BOXER Metal
BMW Biker Scum
BMW Mad Scientist!
VBMWMO #7770, BMW MOA #48694 & Airhead BMW Club #600

bmweuro screwed with this post 10-11-2012 at 08:50 AM
bmweuro is offline   Reply With Quote
Old 10-11-2012, 08:42 AM   #10
naginalf
Handy Schtroumpf
 
naginalf's Avatar
 
Joined: Jan 2010
Location: Madison, WI
Oddometer: 247
Is'nt that .20mm, .30mm, etc.?
__________________
'91 R100GSPD
Adventures with a Type1 TARDIS.
naginalf is offline   Reply With Quote
Old 10-11-2012, 08:49 AM   #11
bmweuro
Mad Scientist
 
bmweuro's Avatar
 
Joined: Nov 2003
Location: Chico, California
Oddometer: 3,270
Quote:
Originally Posted by naginalf View Post
Is'nt that .20mm, .30mm, etc.?
You are correct.
__________________
BOXER Metal
BMW Biker Scum
BMW Mad Scientist!
VBMWMO #7770, BMW MOA #48694 & Airhead BMW Club #600
bmweuro is offline   Reply With Quote
Old 10-11-2012, 08:56 AM   #12
some_guy OP
Gnarly Adventurer
 
some_guy's Avatar
 
Joined: Sep 2012
Location: NoVa
Oddometer: 143
Yup. Gonna order some today.
some_guy is offline   Reply With Quote
Old 10-11-2012, 09:07 AM   #13
Stagehand
+/- V TDSPP
 
Stagehand's Avatar
 
Joined: Oct 2004
Location: Shawangunks
Oddometer: 23,434
Quote:
Originally Posted by bmweuro View Post
You are correct
0.20mm
0.25mm
0.30mm
0.35mm
0.50mm

I noticed the price on the 0.35 is over 3.00 while the rest are 73 cents. Buy 73 cent ones now before BMW raises the price to $3.57. This will happen when they have to reorder them from BMW AG.
THey've been priced that way for over a year. I did this like, january before last and was like wtf, lol $3.75?
__________________
It aint a fit night out for man nor beast.
Stagehand is offline   Reply With Quote
Old 10-11-2012, 01:51 PM   #14
adventure950
Anglo-Saxon
 
Joined: Sep 2005
Location: Northumberland UK
Oddometer: 472
You can always fit one piece rocker gear where their is no play http://www.motoren-israel.com/produc...s--5--90S.html less any taxes they would work out well under euro 200 to those in the states. They still need shimmed once on initial set up ( you can do this off the bike on the workbench but nothing can move so are set for a very very long time - also very neat.
__________________
'A tourist sees what he went to see,
a traveller sees what he sees'
adventure950 is offline   Reply With Quote
Old 10-11-2012, 02:08 PM   #15
supershaft
because I can
 
Joined: Sep 2010
Location: San Francisco Bay area
Oddometer: 7,579
Well, I guess all these years I have been dreaming. No, not really. A C clamp DOES work with the late model setup. It works better than shimming them. I have worked with quite a few that adjust them the old school way. It's easier, faster, cheaper, and better. The 'better' part sells me. Go ahead and shim them if you want, I am just trying to help some do a better job.

That MI setup looks like a solution to a problem that doesn't exist. One thing I have noticed in life: Problems are easy to fix when you make them up to start with.
supershaft 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 07:32 PM.


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