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

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  #11  
Old 3rd September 2021
Ferrous Head's Avatar
Ferrous Head Ferrous Head is offline
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Quote:
Originally Posted by kitabel View Post
The stem ends not in the OEM position can be due to different stem angle, or simply to stem length. I would consider this job #1: what's the angle (and are they mirror images)?
Yes, that the next major step.

I'm not 100% sure if the valves were intended to sit lower in the heads than stock. I have only "eyeballed the angles and I need to work out what they really are.

I have a set of Strociek roller rockers in my stash pile and was originally thinking I could make use of them. Probably not.
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  #12  
Old 3rd September 2021
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Or is it taller heads cause they're alloy and need more meat than cast iron head to support the guides????

If so, made before EVO days, but today, hey presto, fit EVO rods and shorten cylinders to suit...

Patrick
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  #13  
Old 3rd September 2021
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Sportster/Buell Model: XLB, XLCH, Sporton
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I don't know if the engine simply was never finished or someone robbed parts from it.

The fact that a stock rocker box bolts on makes me think that was part of the original plan. But that might not be the case. He obviously ha no problems fabricating things from billit and maybe the rocker boxes were going to be unique too.

I suspect the engine was never finished as their are no exhaust stubs. That's another area I need to address. There is zero evidence the engine was ever run so I suspect not finished.

But did he get so far and give up ?

Orr did I just not get everything he did ?
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  #14  
Old 3rd September 2021
RicThompson RicThompson is offline
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Shame you don't live in Texas, that's a project I'd love to help you with. Not that I know a damned thing about it. It's just cool.
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  #15  
Old 3rd September 2021
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Quote:
Originally Posted by thefrenchowl View Post
Or is it taller heads cause they're alloy and need more meat than cast iron head to support the guides????

If so, made before EVO days, but today, hey presto, fit EVO rods and shorten cylinders to suit...

Patrick
I have only done a very rough measurement but the heads appear to be the same height as stock Iron.
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  #16  
Old 3rd September 2021
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Quote:
Originally Posted by RicThompson View Post
Shame you don't live in Texas, that's a project I'd love to help you with. Not that I know a damned thing about it. It's just cool.

I'm open to any offers or suggestions but I can't really move to Texas.

It's times like this it would be great to have a son who was into these things.

I sometimes can't see the obvious.

( or my tools on the workbench )
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  #17  
Old 3rd September 2021
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I have my suspicions about this engine and about who might have "commissioned" it.

But I can't ask anyone. Seems the relevant parties have passed on.

As I mentioned in my original post the fact that the intake and exhausts are on the "wrong" side is weird.

Unless, of course, you race sidecars.
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  #18  
Old 3rd September 2021
RicThompson RicThompson is offline
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I had 2 daughters, not a bit of help. My hands are tore up today from cleaning gasket surfaces and trying to get a stubborn bolt started.
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  #19  
Old 3rd September 2021
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I have two daughters and a son.

Thankfully, none are interested in my motorcycle junk.

I would be scared witless if they took after me.
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  #20  
Old 4th September 2021
4634indian 4634indian is offline
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many posts in the red stickys index under Hot Rod Parts Thread
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