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 04-18-2013, 05:56 PM   #91
brittrunyon OP
R 100 GS F 650 GS
 
brittrunyon's Avatar
 
Joined: Oct 2010
Location: The High Desert of New Mexico
Oddometer: 474
Damn. Had my cam & crank switched in my head, thanks for straightening me out.
__________________
1992 R 100 GS (ZED)
2007 F 650 GS

My Motorcycle Videos & More @ http://vimeo.com/user2721333
No Rules Photography @ http://brittrunyon.com/

brittrunyon screwed with this post 04-18-2013 at 06:41 PM
brittrunyon is offline   Reply With Quote
Old 04-18-2013, 06:03 PM   #92
Plaka
Brevis illi vita est
 
Joined: Jun 2010
Oddometer: 4,582
Quote:
Originally Posted by brittrunyon View Post
The yellow paint & dark "burn" mark can be seem here, but one tooth left.
Also, there is an obvious yellow mark on the crank right of the dimple. This confused me.



When I go to line the marks up
........I'll rotate 180 and get the two marks closer together
........which sprocket do I turn? The cam clockwise or the crank counter clockwise?

I've heard sealer on the gasket & I've heard no sealer?
I have Yamabond 4

The key on the cam looks good but can't see the crank key.
Crank always at TDC, and you want that accurate. Match up the cam to that. It's a wasted spark system so it doesn't matter which side leads the show.

Go light on the sealer, why I reccomended easy to remove stuff. I have no experience with the Yamabond. I'd go for a little extra besides just the paper, but not set yourself up for a hassle the next time you go in, either getting the cover off or cleaning the old gasket sealant.

Plaka screwed with this post 04-18-2013 at 06:30 PM
Plaka is offline   Reply With Quote
Old 04-18-2013, 07:29 PM   #93
Bill Harris
Confirmed Curmudgeon
 
Bill Harris's Avatar
 
Joined: Sep 2008
Location: backwoods Alabama
Oddometer: 7,305
Oh. I see. ;)



--Bill
__________________
'73 R60/5 Toaster
Luddite. Not just a philosophy, a way of life...
Bill Harris is offline   Reply With Quote
Old 04-18-2013, 07:49 PM   #94
supershaft
because I can
 
Joined: Sep 2010
Location: San Francisco Bay area
Oddometer: 8,830
This is the second airhead here within a year or so that has had the cam one tooth off. You would think someone would notice the bike not starting well and running like crap? If I remember right, they won't even run with the cam off one tooth the other way?

At any rate, the chain and sprocket are not worn enough for that to be the cause of the trouble. That crank sprocket is worn if I am seeing it correctly. I suspect the chain and guides were just replaced. It would be just fine to time the cam correctly and button it back up. I would be tempted to replace the chain and sprocket IF that sprocket is worn. There is no need to go looking for offset keys.

I would install that gasket clean and dry.
supershaft is offline   Reply With Quote
Old 04-18-2013, 08:26 PM   #95
brittrunyon OP
R 100 GS F 650 GS
 
brittrunyon's Avatar
 
Joined: Oct 2010
Location: The High Desert of New Mexico
Oddometer: 474
When I purchased it last month I noticed that it had "funny" way of starting, not that it was difficult to start, just different from my "92 GS.
On cold starts, even with the choke on, I had to open the throttle to prevent it from dieing. I thought it might be the carbs, but that's next. Has a stumble at 1200 rpms as well.
On the road it's just powerless.
And then of course "we" couldn't time it.

I, with my eagle eye, see some wear on the crank sprocket. I know it's hard to diagnose looking at photos.
If "they" indeed just replaced the chain & guides, wouldn't it be best to just do her right & refurbish for another 100k?
The bearings feel fine.

Or could I get another 50k the way it is now. Hmmmmmmmmmmmmmmmmm?
Is it worn enough?
__________________
1992 R 100 GS (ZED)
2007 F 650 GS

My Motorcycle Videos & More @ http://vimeo.com/user2721333
No Rules Photography @ http://brittrunyon.com/
brittrunyon is offline   Reply With Quote
Old 04-18-2013, 09:08 PM   #96
supershaft
because I can
 
Joined: Sep 2010
Location: San Francisco Bay area
Oddometer: 8,830
100k miles out of an airhead timing chain? Good luck! Your going to need it but then again a lot of airhead owners don't mind their airhead clinking and clacking and running like crap while it shakes and shutters and pukes oil all over itself. It seems as if some airhead owners are kind of proud of just how bad their airheads can look and sound and still just barely run.

A entirely new setup will need replacing in 60 or 80k if you want it to sound and run like a top. New chains on worn sprockets should be good for 30 or 40K?

I would get your chain and sprocket from a dealer. There are junk chains out there!
supershaft is offline   Reply With Quote
Old 04-18-2013, 09:39 PM   #97
Plaka
Brevis illi vita est
 
Joined: Jun 2010
Oddometer: 4,582
Quote:
Originally Posted by brittrunyon View Post
When I purchased it last month I noticed that it had "funny" way of starting, not that it was difficult to start, just different from my "92 GS.
On cold starts, even with the choke on, I had to open the throttle to prevent it from dieing. I thought it might be the carbs, but that's next. Has a stumble at 1200 rpms as well.
On the road it's just powerless.
And then of course "we" couldn't time it.

I, with my eagle eye, see some wear on the crank sprocket. I know it's hard to diagnose looking at photos.
If "they" indeed just replaced the chain & guides, wouldn't it be best to just do her right & refurbish for another 100k?
The bearings feel fine.

Or could I get another 50k the way it is now. Hmmmmmmmmmmmmmmmmm?
Is it worn enough?
What does the pluck-the-chain test reveal?

I already bet myself an ice cream bar on what you're going to do. At 5k a year 50000 miles is ten years. You won't consider this.
Plaka is offline   Reply With Quote
Old 04-18-2013, 09:43 PM   #98
Plaka
Brevis illi vita est
 
Joined: Jun 2010
Oddometer: 4,582
Quote:
Originally Posted by Bill Harris View Post
Oh. I see. ;)



--Bill
Root of a negative number. Creative. Makes things more complex but nothing a good imagination can't handle. Didn't you mean to post over in the "Bird Strikes" thread in Perfect Line...
Plaka is offline   Reply With Quote
Old 04-19-2013, 01:27 AM   #99
Bill Harris
Confirmed Curmudgeon
 
Bill Harris's Avatar
 
Joined: Sep 2008
Location: backwoods Alabama
Oddometer: 7,305
Whoosh.
__________________
'73 R60/5 Toaster
Luddite. Not just a philosophy, a way of life...
Bill Harris is offline   Reply With Quote
Old 04-19-2013, 01:31 AM   #100
Bill Harris
Confirmed Curmudgeon
 
Bill Harris's Avatar
 
Joined: Sep 2008
Location: backwoods Alabama
Oddometer: 7,305
Quote:
Originally Posted by brittrunyon View Post
When I purchased it last month...
Yep, that sprocket is done wore out.

Just last month? A lot has happened...

--Bill
__________________
'73 R60/5 Toaster
Luddite. Not just a philosophy, a way of life...
Bill Harris is offline   Reply With Quote
Old 04-19-2013, 06:54 AM   #101
disston
ShadeTreeExpert
 
disston's Avatar
 
Joined: Mar 2011
Location: Silver Spring, Md
Oddometer: 8,977
If we are taking a survey, I vote for the crank sprocket is worn, needs to be replaced. I would say the chain and the crank sprocket should be replaced at least.

However, if you are so inclined, and I always don't like such moves, but if you want to just put the gears in time and Blue Glue it back together it would probably be an improvement. But don't do that, please.
__________________
.
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 04-19-2013, 06:58 AM   #102
brittrunyon OP
R 100 GS F 650 GS
 
brittrunyon's Avatar
 
Joined: Oct 2010
Location: The High Desert of New Mexico
Oddometer: 474
Quote:
Originally Posted by Plaka View Post
What does the pluck-the-chain test reveal?

I already bet myself an ice cream bar on what you're going to do. At 5k a year 50000 miles is ten years. You won't consider this.
"Pluck the chain"

How much slop should there be in the chain with the guide & tensioner off?

1. none
2. 1/4 inch
3. 1/2 inch
4. 3/4 inch
5. 18 inches
6. none of the above

What's your favorite ice cream?
__________________
1992 R 100 GS (ZED)
2007 F 650 GS

My Motorcycle Videos & More @ http://vimeo.com/user2721333
No Rules Photography @ http://brittrunyon.com/
brittrunyon is offline   Reply With Quote
Old 04-19-2013, 07:17 AM   #103
Plaka
Brevis illi vita est
 
Joined: Jun 2010
Oddometer: 4,582
Quote:
Originally Posted by disston View Post
If we are taking a survey, I vote for the crank sprocket is worn, needs to be replaced. I would say the chain and the crank sprocket should be replaced at least.

However, if you are so inclined, and I always don't like such moves, but if you want to just put the gears in time and Blue Glue it back together it would probably be an improvement. But don't do that, please.
How do you know the crank sprocket is worn? or the chain for that matter?

This keeps coming up what isn't coming up is the OP saying: "see, here's the wear"

It has 139k on it and the last 12 years of service records are missing. This is difficult to puzzle out from the original post, which is as scattered as an eighth grade algebra problem. But it's an unknown except that a) by this mileage it likely due and B) someone was monkeying around in there. So my vote is the stuff was replaced fairly recently, and incorrectly.

And I'm backing that up with a ChocoTaco (which I may get anyway)

Plaka screwed with this post 04-19-2013 at 07:25 AM
Plaka is offline   Reply With Quote
Old 04-19-2013, 07:37 AM   #104
disston
ShadeTreeExpert
 
disston's Avatar
 
Joined: Mar 2011
Location: Silver Spring, Md
Oddometer: 8,977
Quote:
Originally Posted by Plaka View Post
This keeps coming up what isn't coming up is the OP saying: "see, here's the wear"
I base my opinion on the photo. The crank sprocket looks worn. My experience is to replace questionable parts for known good parts. This is an opinion and it is the way I decide such things. That is, the decision is made to make the repair in such a manner that it is a known good repair. Not to make the repair two or three times because I thought I could reuse the crank sprocket.

I think the OP is asking "what measurement?" You got a figure? What if it's on the border? How about the noise? Put it back together and change the timing chain when you can hear it through a full face helmet?

It is today a great day to ride. My car is broken down and I went for coffee. Hopefully the part for my car will be in and I get to drive my car for one more month. This car dies in about 40 days. A bummer. Fix your bike once and go for a ride. I will soon be only riding no driving, it looks like.
__________________
.
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 04-19-2013, 07:38 AM   #105
Plaka
Brevis illi vita est
 
Joined: Jun 2010
Oddometer: 4,582
Quote:
Originally Posted by brittrunyon View Post
"Pluck the chain"

How much slop should there be in the chain with the guide & tensioner off?

1. none
2. 1/4 inch
3. 1/2 inch
4. 3/4 inch
5. 18 inches
6. none of the above

What's your favorite ice cream?
How much is there? got a pic? You want the lift mid wrap.

ChocoTaco's


Observing quite a few threads now I've noticed a strong preference for swapping out parts, including buying new parts, over analysis. I shouldn't be surprised. But then I keep my head pretty far down. Keeps me (somewhat) sane. Still I'm puzzled. If ones problem solving style is to just throw money at something rather than thinking about it, where do they get the money?
Plaka 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 03:36 AM.


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