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Ironhead Sportster Motorcycle Talk (1957-1985) For all those that wanna talk about Ironhead Sportster Motorcycles

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case repair, trans reinforcement

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  #11  
Old 22nd July 2012
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Originally Posted by thefrenchowl View Post

As I never have any suitable bits of alloy to machine, I have done a set of cases with a thin metal ring made from the outer race for the mainshaft 23rollers. It's ID is slightly bigger than the boss, seem to remember using a 5 thou shim to close the gap and optain a press fit, plus stud loctite to lock it in situ.

Patrick
old time hot rodders everywhere are smiling after reading that post.
you hit it out of the park my friend.
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  #12  
Old 22nd July 2012
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Originally Posted by chevelle View Post
Have you ever seen an overly tight (i.d) reinforcement ring pinch needle bearing bore?
oh yes.
it must be avoided.

on L66-72 it will lead to bearing failure.

on 54-e66 unwelded rings this may be seen upon bearing replacement.
where the yellow is the bearing


its hard., if not impossible, to get a measurement off the case boss od.

so i made up a set of gaging rings in .001 bore increment steps to find boss od. these gauging rings need to be long enuff to be manipulated inside case.

then i shoot for .001- .002 press
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  #13  
Old 22nd July 2012
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So I guess I have one for speed.


And one for character.
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  #14  
Old 22nd July 2012
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[QUOTE=DR DICK;406592

you got a 60's hotrod. the real deal.
id wouldnt take five 73-76's for it.

i guess others feel like that too.[/QUOTE]

this 1960 xlch,owner does. i,had an idea that i,discussed with bobber58,not long ago. if,you were to weld beads around the countershaft bearing boss,on an taper,larger at the bottom,smaller at the top,done slowly,and allowing to cool between passes,to control warpage,would it allow enough clearance for speedometer to be retained? even if grinding would be required. i,realize that sometimes this speedo drive contributes to the failure.
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  #15  
Old 22nd July 2012
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patrick,is that an xlr,mainshaft bearing? it's,definitely not the stock 23,roller setup
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  #16  
Old 22nd July 2012
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Quote:
Originally Posted by DR DICK View Post
7 step into the time machine with me.
.....................................

you got a 60's hotrod. the real deal.
id wouldnt take five 73-76's for it.
Thanks for the quick escape from reality, Dr.
The more I find I don't know about this bike, the more I love it. The mystery intrigues me.

As for my 73-76 comment, I was joking. However, that is me, dealing with a bit of frustration.

What I thought was a long overdue project finally wrapping up, has now just become phase 2. Not a big deal (if I had known it was coming) but unfortunately, the financial timing just sucks.

That being said, this bike has forced me to understand priorities. I've decided it's time to let 2 yamahas go to a new home.
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  #17  
Old 22nd July 2012
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DOCTOR DICK, I made a ring for my 65 case a few years back out of alluminium (not sure of the grade) I heated it up and set it on and didn`t weld. Now a question, I machined the inner bore parallel without the step you show on your drawings. what is the purpose of the steped bore?......Davi.
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  #18  
Old 23rd July 2012
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Quote:
brucstoudt: is that an xlr,mainshaft bearing? it's,definitely not the stock 23,roller setup
No, my XLRTT is still on loose rollers, that's my Bonneville KHK set up...

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  #19  
Old 23rd July 2012
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thank's for your reply,patrick.
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  #20  
Old 23rd July 2012
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Quote:
Originally Posted by davixlrtt View Post
DOCTOR DICK, I made a ring for my 65 case a few years back out of alluminium (not sure of the grade) I heated it up and set it on and didn`t weld. Now a question, I machined the inner bore parallel without the step you show on your drawings. what is the purpose of the steped bore?......Davi.
as time passed i came to realize that its not too cool to to put compressive forces on the boss so close to the case wall. i believe this adds more stress concentration to corner junction of boss and wall.

consider the .225 relief depth to be the minimum. .250 wont hurt.
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