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Sportster Motorcycle Motor - Top End Discuss Sportster Motorcycle Top End issues. Rockerboxes, Valves, Cylinders, Pistons, Rings, Lift Rods, etc...

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  #1  
Old 24th January 2020
TheSporster TheSporster is offline
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Default Will a late model head('07) fit a '92 Sportster?

Need a new head, found a good one for a good price.

Mine is a '92, this one is a later model, p/n # 16663-07
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  #2  
Old 24th January 2020
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Not really
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Old 24th January 2020
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I have a pair of 883 heads off of an '03 I would sell

Last edited by rocketmangb; 24th January 2020 at 12:16..
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Old 24th January 2020
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Desertfox Desertfox is offline
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Default

I don't think there are any parts from a rubber mount that will interchange with a solid mount. Are there?
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Old 24th January 2020
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Quote:
Originally Posted by Desertfox View Post
I don't think there are any parts from a rubber mount that will interchange with a solid mount. Are there?


the clutch and other insides of the primary will
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Old 24th January 2020
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You just need a new intake, check on hammer performance.
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Old 24th January 2020
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aswracing aswracing is offline
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Quote:
Originally Posted by TheSporster View Post
Need a new head, found a good one for a good price.

Mine is a '92, this one is a later model, p/n # 16663-07
It'll physically bolt-on and work. However, there are some things to be aware of.

First, it's got much larger fins than your other head. So there will be an appearance mismatch, both to the cylinder underneath it and the other head. On the flip side, it'll cool better.

As Rejean alluded to, there's an issue with the intake manifold. That's an EFI head, and Sportster EFI heads have their manifold mating surfaces milled down 1/16" as compared to carb type heads. Generally, when these heads are retrofitted to carbureted bikes, they're done in pairs, and there's a special manifold made that's 1/8" wider to take up the gap. In this case, where you'd only be using one of them, you may get away with using your stock manifold. The danger is that if the gap is too big, it wants to suck the manifold seals into the port on decel, when the vacuum is high.

You'll need one EFI style manifold flange as well, part number 27327-07. Less than ten bucks.

I *believe* the casting number you mentioned is an 883 casting (I'm not at the shop where I can go check). So it's made for an 883 piston, or a dished conversion piston.

If we're talking about the front head, you'll also need a new front motor mount, the one that connects the front head to the steering neck area. That's because the pushrod side bolt is moved inboard on all 2004+ heads. Part number 16689-05, available at your dealer, less than 20 bucks. Also you'll need some 7/16-14 bolts to attach it to the head (your stock setup uses a 3/8 bolt on one side and a 3/8 stud on the other side).

The rocker box will bolt on fine, and your stock pushrods will work fine.

So there are a handful of issues. In my opinion, the appearance is the biggest one. It's going to look funny. The rest of the issues are pretty easy to resolve.
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  #8  
Old 24th January 2020
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Quote:
Originally Posted by Desertfox View Post
I don't think there are any parts from a rubber mount that will interchange with a solid mount. Are there?
There are quite a lot, actually. There are even a handful of parts on rubbermounts that date back to 1957!
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