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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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Old 29th October 2007
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drhooligan drhooligan is offline
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Default 2nd conversion

I currently have an 05 883/1200 conversion with the SE stuff and 497 cams with stock 05 883 heads. Have access to a set of 05 1200 heads(black highlighted fins) for very cheap.

I love the look of the black engine and highlighted fins of the factory 1200s. I'm considering buying a set of stock 1200 highlighted jugs and 1200 pistons to use with the heads. The stock pistons I believe are 9.7:1 CR. Would like higher. there is an SE piston (22711-04) that is 10.5:1. Would those workwith a .497 cam and the stock 05 1200 heads.

I am considering sending the heads to NRHS for a stage 1.

Any advice would be appreciated.
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Old 29th October 2007
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Originally Posted by drhooligan View Post
Would like higher. there is an SE piston (22711-04) that is 10.5:1. Would those workwith a .497 cam and the stock 05 1200 heads.

I am considering sending the heads to NRHS for a stage 1.

Any advice would be appreciated.
Yes these would work.

I am going to be installing the .497's this winter and I'm already at 11:1
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Old 29th October 2007
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I'm not sure which pistons to use. The SEs are 10.5:1 and the stockers are 9.7:1. I guess the 497s would work with the 9.7 stock pistons. I wonder how much power would be left on the table by using the stock 1200 pistons.
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Old 29th October 2007
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If your sending your heads to NRHS why not buy your pistons from them. The 05 1200 heads are extremely good heads. Since this is your 2nd conversion I would suggest going stage 2 on the heads now and maybe preempt the 3rd conversion. The stage 2 will cost a couple hundred more but you'll already be tore down and they will already have your heads.
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