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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 3 Weeks Ago
Iron Mike Iron Mike is offline
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Ferrous, is that the guy from YouTube videos?? The guy that works on the bikes in the junkyard??
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  #12  
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Yup - That's him.

I think he's also famous for his single cylinder Sportster Bonneville exploits.
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  #13  
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Iron Mike Iron Mike is offline
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I went and looked up some of the Bonnevillle singles videos today. I guess that is his shop and not really a junkyard. Looks like his shop has some capabilities, but man it sure looks dirty and unorganized. You can see some decent equipment in the background which shows some capabilities, but the guy is a bit on the aggressive side with some of the parts. Sounds like he has been doing it for a bit and has seen and done a bit of most. i wonder if he has any other shop hands? Looks like he could use a wlling to learn shop grunt to clean the place up following behind him. If you can get past the mess, you could probably pick up a thing or two, just not the work habits.

Interesting record chasing class racer though.
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  #14  
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Perry of FLO Headworks got back to me. He is still in business, and I will try to get my 900 heads off to him this week for an overhaul.
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  #15  
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Try eBay seller leannewinters69 Tim dual plugged a set of 900 heads for me.


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  #16  
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Quote:
Originally Posted by Iron Mike View Post
i wonder if he has any other shop hands? Looks like he could use a wlling to learn shop grunt to clean the place up following behind him. If you can get past the mess, you could probably pick up a thing or two, just not the work habits.
his son works with him.i guess he's busy filming videos. and kicking the '61 XLCH.
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  #17  
Old 2 Weeks Ago
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Quote:
Originally Posted by brucstoudt View Post
that's true but he will mention that a stock 900 does not want or need port work.i would still ask him if he wants the work.
I'm interested in this statement. Is there really nothing to gain by cleaning up the ports on a 900?! Could it actually hurt things?

I have heard that the valves are a little too large for these motors as it is, but that has more to do with the velocity of the gasses moving in/out rather than the smoothness and efficiency of the flow through the ports, right? I figure a little port work and a step up in cam profile to PB or Y cams would yield a small performance increase.

I'm not going to dual plug the heads though, as I intend to run standard 9:1 compression and magneto ignition. Do you guys think that's a mistake?
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  #18  
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Yes, I would dual plug an 8:1 motor.
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At that compression ratio all you will gain by dual plugging is complexity.

Oh, and maybe 1 or 2 hp.

Your plan sounds fine to me.
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If your planning on running a Magneto dual plugging becomes a bit expensive.

It can be done of course but the only commercially available solution I'm aware of is Morris's option requiring two MSF single fire units.

If I could find someone who could supply diodes big enough for the job I could make my own - but haven't managed so far. (Dave's not about to tell me where he gets his)

Paying someone to port Ironheads makes little sense unless your building a bigger engine. Really good porting work is expensive and I would only consider paying top dollar for an engine going to be raced.
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