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 04-13-2012, 10:45 AM   #16
supershaft
because I can
 
Joined: Sep 2010
Location: San Francisco Bay area
Oddometer: 8,275
I am afraid to say that all that trouble is pretty much a classic case of not using a mechanic's stethoscope. Yes, they look funny and you should really put on a white lab coat and maybe fill up your pipe and smoke it just for full effect but they work. I have a couple of times in my life walked up to two or three mechanics arguing about where a sound was coming from and I positively identified the source in a minute with a stethoscope. The trick to them at least at first is to use them without the contact rod. Just that little cup at the end will usually direct you right to the source of the noise or close enough to put the contact rod back on for a closer listen.

I haven't seen this problem yet. Is there a rash of swapping back to the old clutch in our future?? That would be yet another step back to why it got changed in the first place IMO.

The early style flywheel is one piece.

I wonder if anyone has tried combining the later clutch to the earlier flywheel?
supershaft is offline   Reply With Quote
Old 04-13-2012, 11:09 AM   #17
chasbmw
Beastly Adventurer
 
Joined: Feb 2006
Location: Bath Uk
Oddometer: 1,791
Jim Cray in the UK has fitted a lightened early flywheel to the light flywheel bikes, the owner of the bike was very happy with the result!

Motobins have heavy flywheels on sale for 40, which is cheap indeed, however postage overseas might be a little expensive.

I am coming to the reluctant conclusion that the starter problems on my R90 are due to wear on the starter gear, as the flywheel is lightened, then I'm not looking forward to replacing it.
__________________
Charles
http://i46.photobucket.com/albums/f1...ps6e61ae2e.jpg
R90s 1070 replica, R90/6
1971 Commando Fastback
chasbmw is offline   Reply With Quote
Old 04-13-2012, 11:31 AM   #18
supershaft
because I can
 
Joined: Sep 2010
Location: San Francisco Bay area
Oddometer: 8,275
I was wondering if anyone has put a late model pressure plate one an early model flywheel? That would be the best of both worlds for some that prefer more flywheel. I might even want some flywheel if I rode these things in the dirt much. The problem with what Jim Cray did is that then the bike is stuck with an early clutch and they are junk compared to the later ones. They are WAY more likely to slip!
supershaft is offline   Reply With Quote
Old 04-13-2012, 01:48 PM   #19
bereahorn
Beastly Adventurer
 
Joined: Mar 2002
Location: North Coast (Lake Erie)
Oddometer: 1,059
bereahorn is offline   Reply With Quote
Old 04-14-2012, 04:28 AM   #20
chasbmw
Beastly Adventurer
 
Joined: Feb 2006
Location: Bath Uk
Oddometer: 1,791
SS

Jim certainly would have had the fabrication skills to do the job, I think we discussed something similar when he built up my R90 as I think the job included a end plate to the gearbox and it would have involved me in too much money.
__________________
Charles
http://i46.photobucket.com/albums/f1...ps6e61ae2e.jpg
R90s 1070 replica, R90/6
1971 Commando Fastback
chasbmw is offline   Reply With Quote
Old 04-14-2012, 10:28 AM   #21
supershaft
because I can
 
Joined: Sep 2010
Location: San Francisco Bay area
Oddometer: 8,275
Jim and a lot of other people could do it if it is reasonably doable. I have never even thought of it until just now. I suspect if it was reasonably doable Siebenrock or somebody like that would already be offering it? I am going to look into it. I have done a bit a machine work for hire but I have never owned my own equipment. Nevertheless, I have a good friend that is set up to do stuff in high volume. He owns Alleven RC and he owns all of his own CNC stuff!
supershaft is offline   Reply With Quote
Old 11-26-2012, 08:18 PM   #22
Voorspoed
Adventurer
 
Voorspoed's Avatar
 
Joined: Dec 2006
Oddometer: 10
Wink

Goodday people!

Tell me, did your bike sound like this before you fixed it?

http://www.youtube.com/watch?v=phviz4wQInk

http://www.youtube.com/watch?v=YTxj9DKpNLY

Mine sounds like it has the same problem.

Looking fwd to your reply!

Willie Landman
willie@swanniebraai.com
Voorspoed is offline   Reply With Quote
Old 11-27-2012, 07:15 AM   #23
Kai Ju
Beastly Adventurer
 
Kai Ju's Avatar
 
Joined: Jul 2009
Location: So Cal
Oddometer: 1,716
Early Flywheel

SS, the early flywheel is actually a two piece assembly with the ring gear being shrunk onto the flywheel.
No welding that I can tell.
Kai Ju is offline   Reply With Quote
Old 11-27-2012, 07:39 AM   #24
disston
ShadeTreeExpert
 
disston's Avatar
 
Joined: Mar 2011
Location: Silver Spring, Md
Oddometer: 8,378
^^^^^^^^^^^^^^^^^^^^^^^^^^^

Agreed
__________________
.
Never memorize something you can look up.
---Albert Einstein

Pay your debt, piratejohn.http://www.advrider.com/forums/showthread.php?t=949341
disston is offline   Reply With Quote
Old 12-01-2012, 12:49 PM   #25
supershaft
because I can
 
Joined: Sep 2010
Location: San Francisco Bay area
Oddometer: 8,275
I knew that. I just forgot. I think robtg said he has replaced them before.

I looked into putting a late pressure plate onto a earlier flywheel. As I suspected, there is no easuy way to do it. I figured as much or else someone would already be offering that mod.
supershaft is offline   Reply With Quote
Old 12-01-2012, 01:35 PM   #26
DoktorT
BigBrowedNeandereer
 
DoktorT's Avatar
 
Joined: Apr 2009
Location: Chewelah, WA
Oddometer: 1,143
Quote:
Originally Posted by supershaft View Post
I am afraid to say that all that trouble is pretty much a classic case of not using a mechanic's stethoscope.
Must agree that the mechanic's stethoscope is an essential diagnostic tool that works very well to find most any type of noise. I used one virtually every day for 15 years to quickly find noisy bearings and pumps and rockers and ................ 1 minute accurate diagnostics time and again. Top drawer tool box essential. Nothing like expensive either.
DoktorT is offline   Reply With Quote
Old 12-02-2012, 04:21 PM   #27
shel-bou
Adventurer
 
Joined: Nov 2010
Location: victoria BC, bring rainsuit
Oddometer: 19
rg80 engine noise

hi Willie I think you might want to look at the front cam bearing. No personal experience but I hear the aluminum cam bearings were problimatic. SS may enlighten.
shel-bou is offline   Reply With Quote
Old 12-02-2012, 04:35 PM   #28
supershaft
because I can
 
Joined: Sep 2010
Location: San Francisco Bay area
Oddometer: 8,275
I have heard that but have seen no evidence of it. Just about all motorcycle cams run in aluminum bearings. Mine is fine after 101,000 miles. Right at 70k of it with a sport cam that gets reved regularly to 8krpm. I have heard that sport cams will destroy the aluminum bearings. Not mine or others I have seen in use.
supershaft is offline   Reply With Quote
Old 12-02-2012, 10:00 PM   #29
GearHeadGrrrl
Gnarly Adventurer
 
Joined: Feb 2007
Location: SW MN & Flatistan when it snows
Oddometer: 306
Me too!

Had the ring gear come loose at around 50K miles on my '84 R65LS. Put on a new clutch carrier and after another 50K miles, no problems.
__________________
blogging @ www.gearheadgrrrl.com
GearHeadGrrrl is offline   Reply With Quote
Old 12-02-2012, 10:32 PM   #30
squish
Out of the office.
 
Joined: Dec 2003
Location: Where the Ghetto meets the sea.
Oddometer: 5,930
Quote:
Originally Posted by DoktorT View Post
Must agree that the mechanic's stethoscope is an essential diagnostic tool that works very well to find most any type of noise. I used one virtually every day for 15 years to quickly find noisy bearings and pumps and rockers and ................ 1 minute accurate diagnostics time and again. Top drawer tool box essential. Nothing like expensive either.
Or save yourself some cash and just use your long handled screwdrivers,
Work nearly as well and you don't need the lab coat or the pipe.

Flat headed works slightly better since there's every so slightly more contact area.
__________________
On vacation for a spell
squish 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 05:35 AM.


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