| Author |
Message |
    
Mmmi_grad
| | Posted on Wednesday, May 09, 2007 - 07:41 pm: | 
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My pleasure, its why i wrote that here and the following.
Not everything is in the manuals!! HD and MMI expects a person working on these to have good common cents and study what the hell they are doing!! Again attitude aside thats the way it is jack.
You remove the chains. Lay them out and measure pin to bushing clearance for wear.
.003" is 3 % wear [to get this use venieral calipers on a pin and bushing.
.300" total chain lay out clearance means replace the freaking chain now. This is what MMI told me for cycle chains. Other chains and apps will vary!! I just use old fashioned way with ruler or tape and calc.
On a primary chain take it off lay it out. Measure the top and then bottom. Add clearances together. Thats the best way to find your wear on a primary chain. Ofcourse you can come to some conclusion about wear its tight and loose. Experienced people should be able to ID very worn final drive chain without measuring if primary is a belt. I could go on and on. its experience.
New chains pin clearance are the same throughout the chain. Zero wear. Yeah there is a margin of error here but your going to see the wear and be able to make a choice of life or death. Harley is proud of thier gears they are hard mf's. Nothing lasts forever though. lol! now ride safe
(Message edited by mmmi_grad on May 09, 2007) |
Fitz4321
| | Posted on Wednesday, May 09, 2007 - 11:02 pm: |
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MMi... no offense taken. I am not a certified "tech". I'm the guy who started working on my own bike after "techs" at the HD dealership made my bike worse after giving them $2000 of my hard earned $$$$. I probably should have changed it out when I was in there the first time & knew it was slapping against the primary cover.
The bike has 35000 hard canyon riding miles on it. |
Mmmi_grad
| | Posted on Wednesday, May 09, 2007 - 11:09 pm: |
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I remember your Saga Fitz. Even i got pissed. Those idiots at that dealer should be mowing grass for a living!! Managment too!! |
Oldog
| | Posted on Wednesday, May 09, 2007 - 11:26 pm: |
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to get this use venieral calipers on a pin and bushing
Grad your too much! 
venieral calipers, are required after inserting a rusty pin in a scored bush this is to negate the badd effects of .....
Peanutcillin is also required.
 }Pssst Did you mean Vernier caliper?
so about .003" per pitch length Ie 10 links .030" 1/32" 100 links -- .300" is about 5/16" err that would be worn?,
what would the variation be on a new chain?
and can you tell me why a primary chain has a tight spot? |
Djkaplan
| | Posted on Thursday, May 10, 2007 - 08:10 am: |
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Peanutcillin!
You made me chortle. |
Stevem123
| | Posted on Thursday, May 10, 2007 - 03:24 pm: |
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Hey MMI, glad you're on the ball and sorry I took offense at your comment. I was a professional mechanic as a youngster some 28 years ago. I got out of the business because I was tired of bastard customers and worse bosses that didn't pay crap. I think the tide has changed at least for pay but how you put up with some of the morons is beyond me. I like wrenching and enjoy fixing problems. I just get upset when some mechanics refuse to understand that I do know what I'm talking about even though I personally don't wrench for a living. |
Mmmi_grad
| | Posted on Thursday, May 10, 2007 - 05:36 pm: |
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hehehehhe I try to take the funny route when I can. .300" can show up before the total length. Its just a rule to go by. There are formulas for this that include pitch and what chain your using bla bla bla.
I do not wrench for a living just for fun and have rebuilt several bikes for people. Steve I hear ya I couldnt do it either, and I DO KNOW what you mean. You just have to ask those questions and in some cases threaten the manager and the guy working on your bike.
Oldog
}Pssst Did you mean Vernier caliper?
Yes joke there lol
so about .003" per pitch length Ie 10 links .030" 1/32" 100 links -- .300" is about 5/16" err that would be worn?,
dont make this hard. You want hard ask a chain manufacture for the formula to determin chain wear in relation to pitchs and application not me 
too clarify.
measure pin to pin what is measurement. lets say 1/2 inch. look down steel ruler 18 inchs and measure how far pins have drifted from the 1/2 inch mark. a new chain outside pin should stay lined up on each 1/2 inch mark. Just look at how far pin length drifts from an absolute same pin to pin clearance with a new chain.
top chain is new
bottom chain is worn.
http://pardo.net/bike/pic/fail-004/Chain-str-crop- 0250.jpg
what would the variation be on a new chain?
NONE
and can you tell me why a primary chain has a tight spot?
WEAR this includes chain and all related parts around it. alignment, etc. |
Mikej
| | Posted on Thursday, May 10, 2007 - 06:47 pm: |
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"and can you tell me why a primary chain has a tight spot? "
My guess would be manufacturing tolerances, roundness tolerances, concentricity tolerances. Round is round only so far as it is cost effective. |
Blake
| | Posted on Friday, May 11, 2007 - 10:37 am: |
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Only God is perfect, so we have to have tolerance. ![: ]](http://www.badweatherbikers.com/buell/clipart/proud.gif) |
Djkaplan
| | Posted on Friday, May 11, 2007 - 11:22 am: |
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"Round is round only so far as it is cost effective."
I had to check your profile to see if you were an engineer. That is so right. |
Mikej
| | Posted on Friday, May 11, 2007 - 11:39 am: |
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By day I'm currently a CAD designer for an automotive parts supplier/manufacturer, been working with Engineers pretty much the bulk of my working life. Off work I try to do something else, anything else, someplace else. If only the off-work stuff paid better..... 
Tolerance +/- allowance = humanity. |
