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Old 01-11-2012, 01:29 PM   #151
bereahorn
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Old 01-11-2012, 02:00 PM   #152
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Knary, are you saying that the crank is going to be re-used???
The one in that picture???
Wow>
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Old 01-11-2012, 02:21 PM   #153
gplane
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Crankshaft

The crank in the pic is toast.
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Old 01-11-2012, 03:01 PM   #154
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Quote:
Originally Posted by gplane View Post
The crank in the pic is toast.
Burnt toast.
"You can polish a turd all day long, but in the end all you up with is a really shiny turd, and a very sore arm."
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Old 01-11-2012, 03:23 PM   #155
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Quote:
Originally Posted by wirewrkr View Post
Knary, are you saying that the crank is going to be re-used???
The one in that picture???
Wow>
The reaction from someone that's seen his share of bad cranks and installed good ones was, "The photos made it look much worse. Ideally you'd replace it, but if it were me, I'd run it."

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Old 01-11-2012, 05:40 PM   #156
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Quote:
Originally Posted by knary View Post
The reaction from someone that's seen his share of bad cranks and installed good ones was, "The photos made it look much worse. Ideally you'd replace it, but if it were me, I'd run it."

I really really think you should get another opinion.
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Old 01-11-2012, 05:43 PM   #157
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Quote:
Originally Posted by wirewrkr View Post
I really really think you should get another opinion.
What could go wrong?

I'm considering it. A used clean bottom end is around $250.
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Old 01-11-2012, 06:05 PM   #158
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No offense meant whatsoever, but the journal has been really hot. It'll eat those bearings prematurely.
I only want to save you a very early teardown and having to re-do some of your work.
It takes time and $ to go back in.
This will be a test of patience and a decent re-do will cost, but the results should be satisfying.
You should be able to find a much better bottom end and it shouldnt really break the bank.
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Old 01-11-2012, 06:39 PM   #159
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Dammit! I am the expert!

Or not.

No offense possible. Thank you for the feedback. I've been going back and forth on this in my head. Usually $250 sounds like a deal for the piece of mind. Right now it sounds like the prelude to an uncomfortable negotiation. "Sweetie. You know that bike... umm..."


I'm going to do some math and see what I can come up with to get this done. The time to get into the bike doesn't really matter, that sounds like fun. But spending the money twice on various parts and risking other damage is not appealing.
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Old 01-11-2012, 07:38 PM   #160
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Better to do the bottom end right, then you'll know what you've got.
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Old 01-12-2012, 06:36 AM   #161
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Your crank man says he'd run it. Ask his advice about dressing any high points with a stone.

It's a punk bike.

Run it, be sympathetic and don't rev the nuts off it and it will reward you with thousands of miles of faithful service.

Then, when it does start to say goodnight, you'll hear it at startup when the journals are dry before the oil pressure ramps up and you'll have another little project to keep you out of mischief. If it hasn't outlasted you that is.
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Old 01-12-2012, 08:46 AM   #162
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Scott:

Just throw some STP in with your oil, and that crank will work just fine.
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Old 01-12-2012, 09:40 AM   #163
Les_Garten
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These guys are full of Hot air.

I've ran thousands of bikes worse than that!

The secret, use 90w gear oil in the engine.

Only drawback, you need to heat the engine with a blowtorch to get it to start in the winter.

That's a South Florida Winter, YMMV!

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Old 01-12-2012, 10:38 AM   #164
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Quote:
Originally Posted by Packer View Post
Your crank man says he'd run it. Ask his advice about dressing any high points with a stone.

It's a punk bike.

Run it, be sympathetic and don't rev the nuts off it and it will reward you with thousands of miles of faithful service.

Then, when it does start to say goodnight, you'll hear it at startup when the journals are dry before the oil pressure ramps up and you'll have another little project to keep you out of mischief. If it hasn't outlasted you that is.
Okay, folks...I actually looked at and felt the crankshaft. I did that AFTER sending Scott an email saying the exact same things that all of you (who have only seen the picture) are saying. After declaring it toast from 30,000 feet (aka pictures on the Internet), I was shocked when I actually saw the crankshaft. I ran my fingers over the journals...I picked at them with fingernails...I inspected them with a flashlight (okay, a desk light with a long extension cord). In my quick inspection, I could not feel any imperfections...I was shocked...the picture makes it look like a small dog could fall into that groove. In my quick inspection, I could see no bluing or rainbow discoloration (at all) to indicate excessive heat. The shoulders of the journals looked okay...and the bearing shells had not "squeezed" out the side of the rod...they simply rotated.

I would not go so far as to say that I would run it...

...I have good crankshafts and good bottom ends sitting in my shop...why would I run anything questionable? (I always joke that I have a lot of junk to replace my junk when my junk wears out.) On the other hand, if I were six states away from home and did not have a choice, I'd run it and wouldn't worry too much...no more than I would worry anyhow being six states away from home on an airhead...which is no worries at all!!

I did not measure anything and cannot say anything certain about Scott's motor. I looked at it simply because he lives pretty close to me and I have seen the insides of an airhead or three (or so ) before...and, I was pretty certain that he might need one of the bottom ends that I have. I feel like I gave Scott some pragmatic advice based on the big picture. Under some slightly different circumstances, the bike in question would probably scatter into the wind to become spare parts, dust and rust...at the end of the day, it's a series of unknown components in boxes. More power to Scott for taking on the project and carrying so much enthusiasm with him in the process. If he does everything the "right" way, he will easily have a ten thousand dollar bike that is worth three. There's nothing wrong with that...I've been involved in many bike projects that didn't make financial sense. In this case, Scott needs to figure out the fine line between sense and nonsense.

The bottom line is: while a picture can be worth a thousand words...a picture can also be very deceiving. Scott and I stood next to the engine in question and discussed all of the above. I have a financial interest in the crankshaft being bad, but just have to concede that it's WAY better than I had expected.
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Old 01-12-2012, 10:49 AM   #165
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I think I'm going to cry.

I think you and Packer have it spot on. In an ideal world, it would be replaced. But that's not this bike. Or this owner.

What could go wrong?

(I like smileys. sue me)

p.s. I wasn't going to name names if it grenaded.
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