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 05-15-2011, 07:39 AM   #31
Rapid Dog OP
bikes, booze, broads...
 
Rapid Dog's Avatar
 
Joined: Oct 2003
Location: Strangel Living West of Hell
Oddometer: 8,959
...,yeah, that's what I was thinking too...?
__________________
'09 450 EXC Nani Roma Limited/'08 R1200R-Gone to the Hipsters/'02 Dirty lil KTM400EXC-gone to a good home/'10 WR290X/R buhbye!
'81 R100RS Rattlecandy Red/'06 950 ADV Orangeboom/91 R100GSPD Derelict

Rapid Dog is offline   Reply With Quote
Old 05-15-2011, 07:47 AM   #32
wirewrkr
the thread-killer
 
wirewrkr's Avatar
 
Joined: May 2008
Location: HIGH desert
Oddometer: 4,297
Quote:
Originally Posted by Rucksta View Post
Stagehand I appeciate what you're saying about scope creep but...
can you pull the rockers, remove the pushrods and insert a telescopic magnetic wand down each hole to retract the cam followers then remove the cam without further upset to the top end?

I haven't tried it so it's more of an idea that an actual techinque.
Yes, that works.
Done it.
__________________

www.wirewerkes.com
KILL YOUR TELEVISION !!!!

wirewrkr screwed with this post 05-15-2011 at 07:58 AM
wirewrkr is offline   Reply With Quote
Old 05-15-2011, 07:51 AM   #33
Stagehand
+/- V TDSPP
 
Stagehand's Avatar
 
Joined: Oct 2004
Location: Shawangunks
Oddometer: 24,927
good idea!
__________________
Unintentional psychokinesis.
Stagehand is offline   Reply With Quote
Old 05-15-2011, 08:00 AM   #34
Rob Farmer
Beastly Adventurer
 
Rob Farmer's Avatar
 
Joined: Aug 2002
Location: Loughborough, Leicestershire. England
Oddometer: 4,972
all you need to do is turn the cam once it will then push the followers up out of the way or drop the sump and do it with your fingers.
Rob Farmer is offline   Reply With Quote
Old 05-15-2011, 08:24 AM   #35
Rapid Dog OP
bikes, booze, broads...
 
Rapid Dog's Avatar
 
Joined: Oct 2003
Location: Strangel Living West of Hell
Oddometer: 8,959
Question

...now you guys got me thinkin' again.
I just didn't want to undo my nice sealed jugs.

Drop the sump? I don't see any access to the lifters in there...
__________________
'09 450 EXC Nani Roma Limited/'08 R1200R-Gone to the Hipsters/'02 Dirty lil KTM400EXC-gone to a good home/'10 WR290X/R buhbye!
'81 R100RS Rattlecandy Red/'06 950 ADV Orangeboom/91 R100GSPD Derelict

Rapid Dog is offline   Reply With Quote
Old 05-15-2011, 10:24 AM   #36
Rob Farmer
Beastly Adventurer
 
Rob Farmer's Avatar
 
Joined: Aug 2002
Location: Loughborough, Leicestershire. England
Oddometer: 4,972
Quote:
Originally Posted by Rapid Dog View Post
.
Drop the sump? I don't see any access to the lifters in there...
Well that's egg on my face..could have sworn you could get to them from below.

I've swapped cams without taking the jugs off before. With the pushrods out just turn the cam and the lifters will be pushed up out of the way.
Rob Farmer is offline   Reply With Quote
Old 05-15-2011, 10:47 AM   #37
Lornce
Lost In Place
 
Lornce's Avatar
 
Joined: Aug 2003
Location: Way Out There.
Oddometer: 17,368
Quote:
Originally Posted by Rucksta View Post
Stagehand I appeciate what you're saying about scope creep but...
can you pull the rockers, remove the pushrods and insert a telescopic magnetic wand down each hole to retract the cam followers then remove the cam without further upset to the top end?

I haven't tried it so it's more of an idea that an actual techinque.
Sounds doable to me.

Lornce is online now   Reply With Quote
Old 05-15-2011, 10:54 AM   #38
Bill Harris
Confirmed Curmudgeon
 
Bill Harris's Avatar
 
Joined: Sep 2008
Location: backwoods Alabama
Oddometer: 6,055
Quote:
Originally Posted by Rucksta View Post
...can you pull the rockers, remove the pushrods and insert a telescopic magnetic wand down each hole to retract the cam followers then remove the cam without further upset to the top end?

I haven't tried it so it's more of an idea that an actual techinque.
I 've not done that because I've heard that the magnetic wand can magnetize the followers and make them attract every magnetic chip in the oil flow. I've not seen it one way or the other, just sayin'...
__________________
'73 R60/5 Toaster
Luddite. Not just a philosophy, a way of life...
Bill Harris is offline   Reply With Quote
Old 05-15-2011, 10:58 AM   #39
wmax351
Studly Adventurer
 
Joined: Mar 2011
Location: Marin County and Berkeley, CA
Oddometer: 743
Quote:
Originally Posted by supershaft View Post
Cam sprocket? That all depends on if you have a duplex or simplex chain. The simplex cam sprockets for some reason almost never wear AT ALL. Your chain will last just as long with a used one because their is no difference usually between a used one and a new one. I am going on my experience as a pro wrench AND the accumulated experience of all the mechanics that I have worked with at a number of very busy dealerships. Not to mention what I gleaned as a child and young adult hanging out, helping, and working in my dad's BMW dealership.

It doesn't take any special tools other than some feeler gauges to set the camshaft end play.
Yeah. This was for a /5 with the duplex.
wmax351 is offline   Reply With Quote
Old 05-15-2011, 11:29 AM   #40
supershaft
because I can
 
Joined: Sep 2010
Location: San Francisco Bay area
Oddometer: 8,020
Yea, the duplex cam sprockets wear. They often need replacing if you want your chain to last anywhere near as long as it should. The crank sprocket just about always does.

The lifters won't hit you in the face after you take the sump off but you can get to them from there.

The problem in my view with replacing the cam without removing the cylinders is that you can't check the condition of the lifters which very often is not good. There is no way I would run a sport cam without first checking the lifters for pitting.
supershaft is offline   Reply With Quote
Old 05-15-2011, 12:40 PM   #41
tony the tiger
yeah - what he said...
 
tony the tiger's Avatar
 
Joined: Jan 2008
Location: secret owner of a Parmesan cheese factory
Oddometer: 9,627
Cool2

Quote:
Originally Posted by BMWRSNUT View Post
Snowbum has a bit to say on this & also suggests consideration as to whether the tebnsioner & spockets are changed.

...
Changed both gears and the chain on my sidecar rig (formerly Snowbum's). Followed the directions on his webpage - it was pretty simple. Scary as to some details, but a borrowed "caged" 3-jaw puller and a thrift store electric frypan (to heat up the gears and bearing, suspended in an oil bath)... used a brass washer during install between my drift and the crank gear & bearing. Can't remember the temperature but they really slid right on very easily. Don't forget to replace the bearing!

Just finished doing rings/heads on the rig too - the old Airhead has a noticeably improved performance with ~104,000 miles on the clock (purchased @92k).

Oh yes, and that frigkin master link...

__________________
Tony
Quote:
Your signature contains too many lines and must be shortened. You may only have up to 5 line(s). Long text may have been implicitly wrapped, causing it to be counted as multiple lines.
tony the tiger is offline   Reply With Quote
Old 05-15-2011, 02:44 PM   #42
Xcuvator
Justa Venturer
 
Xcuvator's Avatar
 
Joined: Jul 2007
Location: Skolls Or
Oddometer: 1,348
Most of the BMW lifters I have seen that have some miles on them are starting to show at least the first signs of pitting. FWIW I think a new cam should have new lifters.
also:
If you put a dab of sticky grease on the end of a pushrod the lifter can be withdrawn.
__________________
___________________________________________

So much riding-so little time
Xcuvator is offline   Reply With Quote
Old 05-15-2011, 02:55 PM   #43
supershaft
because I can
 
Joined: Sep 2010
Location: San Francisco Bay area
Oddometer: 8,020
From what I can tell, I think a lifter that is in your bike and not pitting has just as good or better chance of not pitting in the future versus a new one.
supershaft is offline   Reply With Quote
Old 05-15-2011, 03:13 PM   #44
Hawk Medicine
Coyote's Brother
 
Joined: Jun 2008
Location: NOR CAL
Oddometer: 3,303
Quote:
Originally Posted by Xcuvator View Post
Most of the BMW lifters I have seen that have some miles on them are starting to show at least the first signs of pitting. FWIW I think a new cam should have new lifters.
also:
If you put a dab of sticky grease on the end of a pushrod the lifter can be withdrawn.
How many miles and under what conditions? I've seen under 40K mile lifters that were pitted to Hell from the bike sitting a lot and the ones that came out of my 200K mile R90 were just starting to go bad. It just depends and thats why, if I was going to swap cams, I'd at least want to take a look.

OTOH, the word on the street for the last um-teen years says that if you're installing a new flat-tappet cam, you install new lifters. Always...
__________________
Hawkdude

Hate rots the pocket that carries it.
Hawk Medicine is offline   Reply With Quote
Old 05-15-2011, 05:11 PM   #45
Rapid Dog OP
bikes, booze, broads...
 
Rapid Dog's Avatar
 
Joined: Oct 2003
Location: Strangel Living West of Hell
Oddometer: 8,959
....I'll do the cam some day when I'm sure I've replaced everything else. I've only done about 70% so far...
__________________
'09 450 EXC Nani Roma Limited/'08 R1200R-Gone to the Hipsters/'02 Dirty lil KTM400EXC-gone to a good home/'10 WR290X/R buhbye!
'81 R100RS Rattlecandy Red/'06 950 ADV Orangeboom/91 R100GSPD Derelict

Rapid Dog 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 11:14 AM.


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