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

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Tags
air cleaner, cv carb, exposed, ironhead, water

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  #1  
Old 15th July 2010
chimera555 chimera555 is offline
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Post Air cleaners

Hello everyone.
I have a question abort air cleaners.

I have an 1984 sportster with a CV carb. The original oval style air cleaner is still on the carb an sticks out quite a distance because of the carb adapter.

I would like to put a smaller diameter air filter on there so I have room to squeeze my knee on to the tank so I can hold on around the corners.

I have been told its best to stay away from any air cleaner that has an exposed filter because water gets sucked in threw the filter and when the cool water hits the hot valve it puts a mark on it that puts a lot of wear and tear on the valve and seat.

It sounded like sound advice to me but its pretty difficult to find an air cleaner (other than stock) that has a completely covered air filter.

Can any one offer any thoughts or experience on this topic. thanks
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  #2  
Old 15th July 2010
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jharback jharback is offline
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With the ironhead I think your somewhat limited on selection. I know NRHS makes their Hurricane Filter with an offset (it's moved forward a couple of inches) but, I don't think they make them for the ironhead. Maybe you could modify it to make it fit.
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  #3  
Old 15th July 2010
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Ivan RoachCoach Ivan RoachCoach is offline
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Default Take ANY air filter and re-drill the mounting-hole pattern to suit...

...your needs.

Running exposed filters to achieve maximum air intake is as old as motorcycling itself.
Everyone does it without any problems, as long as it's a quality filtering element.

Get used to running only K&N filters.
Not only are they the best for filtering out crud, they're also the most free-flowing and water won't get past it's stiff, pleated element.
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Old 15th July 2010
chimera555 chimera555 is offline
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Default

yeah I see just about everyone runs an air cleaner with an exposed filter. I couldn't imagine if it was that big a problem that ppl would continue to do it.. but then again you never know.

I asked the guy about K&N filters and he said it doesn't make a difference.. Every one in the area says this guy knows what hes talking about an every one likes him. He said he assumed it was dirt getting sucked in around the filters at first that was marking up the vales but finally figured out that this was the problem..

So is that an ironhead problem or does it apply to the evo's as well? I didn't ask him but it doesn't really help me out either way.

Maybe ill be making my own air cleaner based around a K&N filter... idk...
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Old 15th July 2010
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I don't know if water as long as it wasn't awhole bunch would hurt the valves.Some U aviation guys may remember in WWII I think it was the mustang plane but I'm not sure but one used water injection when they needed extra speed.
My Dad used to pour water from a coke bottle into the carb to decarbon car motors that came from up north and had never really been opened up to high speeds.This he said would take the carbon off the heads and valves.You had to be careful are you could blow a muffler they didn't have convertors back then.
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Old 15th July 2010
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Quote:
Originally Posted by chimera555 View Post
... Every one in the area says this guy knows what hes talking about an every one likes him ...
These guys are often opinionated rather than knowledgeable.
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  #7  
Old 15th July 2010
chimera555 chimera555 is offline
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thanks guys. I guess I will run this round 6" air cleaner I picked up for 20$. One of the dealers near by had it kickin around and wanted it out of there storage area. It was open but it was all there and unscratched.
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  #8  
Old 15th July 2010
steve0suprem0 steve0suprem0 is offline
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Most water injected aircraft were also using forced induction. Hell, back when I was drivin my supercharged BMW 525i, I was seriously putting thought into water injection. It's only there to prevent detonation. Cools intake air.
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Old 17th July 2010
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I use Two the stock for if i know its gona rain...and full open for clear days it only takes 5 min to swap..
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Old 17th July 2010
steve0suprem0 steve0suprem0 is offline
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^not a bad idea. I'm still scared of riding in rain. Luckily, we don't get a whole lot out here.
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