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Sportster Motorcycle Engine Conversions Advice, questions, and tips for 1200, 1250, 1340, 1450 etc... for Sportster and Buell motorcycle engine conversions

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  #1  
Old 25th April 2005
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Sportster/Buell Model: Hugger 883/1200 conv
Sportster/Buell Year: 2002
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Default '86 Heads on 2003 cylinders

Other than the breather bolt situation is there any reason why I couldn't put a set of '86 883 heads on a pair of 2003 883 cylinders? I have the opportunity to pick up these "bathtub chamber" heads for $225. I just bought the 2003 cylinders from Ebay and was planning on sending everything to Nallins for a 1200 conversion with a Stage 1 P&P job. BTW, this will all be going on a 2002 Hugger with the addition of a set of Andrews N2 cams.

Brian
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  #2  
Old 25th April 2005
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How is your engine going to vent?
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  #3  
Old 25th April 2005
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Sportster/Buell Model: Hugger 883/1200 conv
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Quote:
Originally Posted by Y2K
How is your engine going to vent?
I guess I'd have to run a crankcase vent line somehow like they used to have on the pre-breather bolt heads. I guess that's what I'm asking here.

Brian
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Old 26th April 2005
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Quote:
Originally Posted by bdjhog02
Other than the breather bolt situation is there any reason why I couldn't put a set of '86 883 heads on a pair of 2003 883 cylinders? I have the opportunity to pick up these "bathtub chamber" heads for $225. I just bought the 2003 cylinders from Ebay and was planning on sending everything to Nallins for a 1200 conversion with a Stage 1 P&P job. BTW, this will all be going on a 2002 Hugger with the addition of a set of Andrews N2 cams.

Brian
they can drill those heads For the breathers very easy. i also have a set of them. thinking bout getting rid of them too. won't need them now.
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  #5  
Old 26th April 2005
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I'm running 86 heads on mine too. I drill the vent hole that runs through the cylinders and heads and then the hole tat goes from the heads to the air cleaner. I had to shorten the original air cleaner bolts too.
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Old 27th April 2005
happyman happyman is offline
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Quote:
Originally Posted by HD1200R
I'm running 86 heads on mine too. I drill the vent hole that runs through the cylinders and heads and then the hole tat goes from the heads to the air cleaner. I had to shorten the original air cleaner bolts too.
supposedly these are a decent head to make tq and hp but i am sure there sponcers here that can do as good with the sportster or buel heads or better perhaps. not an expert by no means but i guess the 86 heads do make the ##'s
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Old 27th April 2005
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I got lucky and dad already had a set of P&P 86 heads. I don't know about creating better numbers though. I always saw them as standard 883 heads that were modified.

The best bang for buck would be the Nallin Racing XB12R heads fully assembled without the porting. You get awesome results with not going over $1000! If you want them opened up some and modified, expect to spend at least a grand on heads and work.
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