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

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  #51  
Old 28th June 2018
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you sure can-

since not many of us have a tool in our toolbox, and NO shops around here have one- I checked to see what could be found-

I found this http://www.open-sport.org/Repair/Hon...shaft-bearing/

so talked to my local indy shop- well versed in such- and he told me never use a brake hone, but a ball hone is how he did it.

been 4 years and zero tranny problems.
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  #52  
Old 28th June 2018
Iron Mike Iron Mike is online now
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Yes Trap I agree ball hone will clearance the race enough to install the brgs and run. The issue I personally do not like about the ball hone is clearly represented in the text you provided. The rigid lap clearly shows the highs and lows in the race on initial pass. a ball hone or brake flex hone will follow those contours. If the ball hone is your only option and you must get home, have at it. I do understand not everyone has access to everything and we have to do what we need to do.
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  #53  
Old 28th June 2018
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Using a ball hone is the same as using a brake hone. Both tools are made to re-finish a bore, NOT RESIZE it. Neither of these tools will make a hole round or straight.

So using a ball hone or a brake hone is only marginally better than using a drum sander or a piece of sandpaper wrapped around your finger.
In this case not only sizing but where the hole is pointed is also an important factor.

The correct tool to do this job needs to be centered through the trap door bearing. Any machinist worth his salt knows this, and anyone who tells you different is a hack. There are many wrong ways to do this job, I could cut down a machete so it fit through the trap door and scrape the race to size and that would be near as good as a brake hone or a ball hone. Or I could take a tapered punch and drive it into the race with a sledge hammer until the race opened up enough to fit the bearings. That could "work" too! Just depends on your interpretation of the word "work".

This is a roller bearing race it handles huge loads because it has many rollers and spreads the load out across what is supposed to be a flat surface. If that surface is not sufficiently flat or not pointed in the right direction, the load is concentrated in a much much smaller area which exceeds the limits of the bearing design. The load area changes from 98% to less than 20% or in the case of an angled bore in the 2 to 5% contact area. This is way beyond any applicable service limits or sanity. And can obviously never last anywhere near a normal service life.

Remember in the case of a failure, you are talking about the cost of a race, the 23 bearings, a mainshaft, thrust washers and the cost of shimming the trans, all of the bearings in the trans (because the hardened metal shed off the overloaded bearings contaminates the oil), plus the labor of a complete trans shuffle, and how many days missed riding, PLUS all the costs of doing it wrong the first time. That's a hefty price to pay for not using the right tool for the job.

The Right Tool For The Job
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  #54  
Old 28th June 2018
Iron Mike Iron Mike is online now
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Well said Rick. Most of us know these will RUN with the "machete clearance theory", but the correct tool makes the difference of 4years no trans issues , and 40 yrs of no trans issues. Too each his own.

I knew early on that I would have an interest in maintaining my old iron for years to come (Pans, Shovels and some Euro's ect.). Over time I have invested in personal tooling for my home shop (personal use only) just for that reason. Not very expensive if you search and purchase over time. They pay for themselves over time just from reconditioning your own parts at home. And it saves the mental anguish of have to trudge down to most local shops only to be denied service or parts for your vintage machines. And the satisfaction of knowing you fixed your ride correctly and personally.
My Sunnen has a well placed sticker on it to remind me that my tinkering at home is my escape and not "work" It reads "Recreational Use Only".
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  #55  
Old 28th June 2018
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goodbye- I get so sick of this elitist bullshit. Please delete my account.
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  #56  
Old 28th June 2018
Iron Mike Iron Mike is online now
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Far from elitist bullshit. I agreed with everything you mentioned. The ball hone will get you going, But it is not the correct method and you will not get the same results. Measure that fricken ball honed race when your done and youll see its incorrect. Its not elitist crap, its fact. Bore gauges don't lie. I don't give a crap if you use a 50cal to size the race, incorrect is incorrect.
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  #57  
Old 28th June 2018
Iron Mike Iron Mike is online now
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Im far from elitist
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  #58  
Old 28th June 2018
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I am.

Oh. ........ Wait a minute.

That's what my mates call me because I only ride Ironheads.
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  #59  
Old 29th June 2018
Iron Mike Iron Mike is online now
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Ferrous, you will have completely shattered my image of you, if that's all they call you!
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  #60  
Old 29th June 2018
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Oh no, that's not all they call me.

But if I write those things up here they get censored.
besides which, I actually do know who my father was,
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