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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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View Poll Results: What kind of ignition for your conversion?
I am running the stock 883 Ignition Module 25 33.78%
I am running a module for a stock 1200 3 4.05%
I am running an SE or other non-programmable upgraded ignition 8 10.81%
I am running a programmable/adjustable ignition (TC88A for example) 38 51.35%
Voters: 74. You may not vote on this poll

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  #21  
Old 16th October 2007
pierrehenri's Avatar
pierrehenri pierrehenri is offline
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sorry i make a mistake about the questions i d'ont see you spoke about conversion.
so i vote twin tech tc88 modul but i have a 1200 r rubermount.
sorry don't take about my vote.
regards
pierre
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  #22  
Old 14th February 2008
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JayFL459 JayFL459 is offline
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Vtwin Big Bore Jugs
9.5:1 Wiseco Pistons, Hasting Rings
Stock Head, Cam, Ignition
Changed Valve Seals
Screamin Eagle AC
V&H Slip Ons
Carb Rejet #45 #180
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  #23  
Old 23rd March 2008
Phil Kerney Phil Kerney is offline
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Default Keith Black Pistons Conversion

Hi,

I have a conversion using Keith Black hypereutectic pistons.

After conversion, there was serious knocking. I mothballed the bike for a few months researching ignitions and ultimately waiting for a good deal on a SE Ignition Race Tuner.

When this went in, I loaded the 1200 standard curve and the knocking was lessened but still there.

The next angle of attack was a conversion of Turbota's 35 map for TC88A to IRT and some success was had.

Keith Black say that their 'magic' alloy pistons encourage a quicker burn and need about I think 3-6 drgrees less ignition advance. There has been skepiticism hereabouts regarding this, but with this programmed in the bike finally became rideable.

Further carb tuning followed and the bike is now a thundering beast.

This has been a reasonably stressful, at times, journey but the learning curve, and the help I have gained from reading this forum has been so satisfying that I am glad now that I am not riding around on a stock 1200.

The real surprise comes when you compare the stock 883 curve numbers to my new 1200KB curve! Radical differences.

Love my Sporty...

883-1200 KB Conversion,
S&S Super Air Cleaner, S&S Slip On Slash Downs,
SE IRT Custom curves, 45/180, S&S needle.
Progressive 440 Heavy Duty rear.
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  #24  
Old 8th March 2014
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AnaChris AnaChris is offline
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how many have run the 883 ignition and made it more than a few thousand miles before catastophy?
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  #25  
Old 8th March 2014
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AnaChris AnaChris is offline
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Quote:
Originally Posted by paulskav View Post
FWIW I have a 2004 883 with 1250 conversion and I'm still using my stock ignition. No probs. I also have stock heads and stock cams FYI
stock heads and cams is key here i think....i would think your on the 'edge' any more compression, cylinder fill wtever..and pingingingigng i had a ported 883 head and .590 cams and the 883 ignition...it wasnt pretty...fast yes...but ...waht a mess
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  #26  
Old 15th March 2014
hairy hairy is offline
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I ran kb pistons when i done my 1200 conversion with stock cams and heads.
it only pinged when it sat in traffic and got hot running 98 Ron fuel.
I was only running a s.e race fueled but it was maxed out so probly could have done with more fuel.
i pulled the engine down after 5k km and all was like new inside.
then i went with a crush top end and never looked back
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  #27  
Old 4th September 2017
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2003 1200
Hammer Smash small fin 1250
883 Smash heads
N4 cams
S&S XXX Super E with 2.5 inch manifold spacer and T-Jet
Ultima Ignition programmed with the Dynatek #4 curve -2* below 3300 rpm and 26 above 80 * track temp or 28 * below 80 * track temps
11.52 at 115mph on Sunoco 260GT 11.65 at 112 mph on Sunoco 93
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  #28  
Old 11th September 2017
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Can you have the 883 module reflashed at a dealer?
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  #29  
Old 27th July 2018
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Quote:
Originally Posted by henry p ratas View Post
Can you have the 883 module reflashed at a dealer?
They will if they install the SE 1200 kit; for aftermarket good luck finding a dealer that will do it. They might do it but without installation ???
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  #30  
Old 6th August 2018
Jollly Rogers Jollly Rogers is offline
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Does anyone have the part # for the Screaming Eagle race tuner to fit an 06 883/1200 ?
Joe
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