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  #1  
Old 28th March 2010
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Sportster/Buell Model: xl 883
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Default 03 XB9R FIREBOLT ENGINE in SPORTSTER

I have an 88 sportster
looking at putting an 03 xb9r engine in it
will it bolt up?
will the sportster intake manifold fit?
what ignition could I use-stock sportster?
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Old 28th March 2010
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Sportster/Buell Model: xl1218rr turbo
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Nice bike. I don't believe bolting right up is going to happen. I would look at some of the frame suppliers for sporties to see where the mounts are located when using an XB motor. Who makes the swingarm you are using?
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Last edited by rottenralph; 28th March 2010 at 23:48..
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Old 28th March 2010
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what does bolt into the 88 frame?
I was told the early(up to 03) 1200 lightning engine
cyclone engine?
swingarm is actually an 06 honda cbr 1000,upsidedown
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Old 28th March 2010
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Default

My message was a little disjointed. I meant frame suppliers because I know some of the buell frames take XB engines. I would use a five speed lower end and mate a 1250 to it with XB style heads(1200 after 04). Nrhs Performance sells the 1250 kit and they have a dyno room that will make it evident that a 100+ engine is possible to put in your frame. I am not sure if a rubber mount engine will go right in.

Where is the rear shock hiding?
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Old 29th March 2010
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The 2002 and earlier engines will fit with no major issue. The XB engines have totally different mounting points. It can be done with severely modifying the frame, but the 2002 and earlier engines have 4 bolt holes in the rear where it mounts to the frame. The XB engines do not have this, as they have a swingarm pivot mount in place of the holes.

The Sportster intake manifold will fit.
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