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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 10th August 2012
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Default Buell heads

Has anyone tried using a 2005 Buell 1200 top end on a ridgid sporty? I know the heads will bolt up to the engine fine. My concern is the engine mounts.
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  #2  
Old 10th August 2012
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Very simple mod to make fit. its easy. somebody will chime in about pushrod length. those heads are shorter
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Old 10th August 2012
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You just need to widen front motor mount for larger bolts. i think thats it. maybe different intake flange
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  #4  
Old 10th August 2012
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This is from Hammer Performance web page

As far as retrofitting these heads to 03 & earlier models go, there are some things to be aware of:

•The fins on rubber mount heads are a little larger than the fins on the earlier heads, so they won't match up to your cylinders quite as well. It's most noticeable on the left (spark plug side) but most people don't think it looks bad at all.

•The front motor mount bolt holes are 7/16-14 (like the Buell heads described above), but also the right front bolt hole (pushrod side) has been moved inboard 1/4". A special bracket is readily available from HAMMER PERFORMANCE to take care of this and allow you to bolt the heads right on to your 03 or older Sportster.

•As delivered from the factory, these heads are .020" shorter than the previous generation heads, at 3.670" instead of 3.690". Normally this is not enough to worry about with respect to pushrod length and manifold fit. However if you're shortening the motor further via thin gaskets or further decking, it's something to be aware of. Once you've shortened the stack by .045 to .050" overall you need to be thinking about these things.

•None of these late model heads are available from the factory in an assembled form. You have to buy the heads bare and then buy the valves, springs, retainers, locks, and guide seal/locaters separately and do the assembly yourself. However, HAMMER PERFORMANCE sells these heads fully assembled and ready to bolt-on for the same price that the heads and hardware will cost you at your dealer. We'll also include our special High-Flow Swirl Polished Stainless Steel valves instead of the cheap factory valves, again at no extra cost!
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  #5  
Old 10th August 2012
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Well what I may have is acsess to a totaled out 05 XB12R. So in theory I could pull anything of of it I might need.
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Old 10th August 2012
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Quote:
Originally Posted by Steve3888 View Post
Well what I may have is acsess to a totaled out 05 XB12R. So in theory I could pull anything of of it I might need.
Take your toolbox and get everything that you can get off that puppy !!
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  #7  
Old 10th August 2012
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You will need to tap breather bolt holes/ carb mount bracket as they are not tapped onthe xb. I drilled and tapped a set off of an xb9 to run on his sportster.
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Old 10th August 2012
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So pull the jugs pistons and heads?
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  #9  
Old 10th August 2012
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yep take the hole top end would be the way to go or see if you can get the hole engin .
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  #10  
Old 10th August 2012
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Quote:
Originally Posted by 02883r View Post
You will need to tap breather bolt holes/ carb mount bracket as they are not tapped onthe xb. I drilled and tapped a set off of an xb9 to run on his sportster.
I would tap them for Carb support only, but not drill them through for the breather. The buell rocker covers already have pcv valves in them, a far better vent system than the sportster/early buell setup.
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