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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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  #21  
Old 20th December 2009
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sportsterpaul sportsterpaul is offline
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Sportster/Buell Model: XL1460C
Sportster/Buell Year: 2000
Sportster/Buell Model #2: XL1200R
Sportster/Buell Year #2: 2006
Other Motorcycle Model: XL1200R
Other Motorcycle Year: 2004
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I don't want to sidetrack this thread but had considered the V-ro brakes, front, for my '061200R. Did you run into any problems? Am also considering Lyndall composite rotors and keeping the stock Nissan calipers.
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  #22  
Old 24th December 2009
rdjmp rdjmp is offline
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Sportster/Buell Model: 1200S
Sportster/Buell Year: 1997
Sportster/Buell Model #2: 1200R
Sportster/Buell Year #2: '06
Other Motorcycle Model: VRSCX
Other Motorcycle Year: '07
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Those Lyndall rotors work wonderfully with the right pads and shave weight in the best place to loose it. Swan Composites has some nice ones, too.
VRod brakes will bolt right up. The VR/touring calipers are, however, considerably heavier than the current XL calipers. '06 and up Brembo calipers for VRod are the same as HD touring bikes and thus pretty cheap and widely available. Pre-06 VRSC calipers are the same as pre-'04 XL calipers. The '06 ups run 11.8 inch rotors as opposed to the 11.5 inch rotors on older VRods and current sportsters. The later calipers will work on the 11.5 rotors with some loss of effect. I have a pre-production VRSCX that HD put together with Brembo calipers and 11.5" rotors and it works fine. The only VRod that ran the "standard" bolt pattern 11.8" rotors are the '07 VRSCX and the '08 VRSCAW. Of course the standard 11.8" touring rotors will work. Dual disc XL brake lines will work or VRSCR lines fit nicely with the wider XL sport bars.
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  #23  
Old 28th December 2009
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Sportster/Buell Model: XL1460C
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Sportster/Buell Model #2: XL1200R
Sportster/Buell Year #2: 2006
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RDJMP: Thanks, I plan on attending the dealer show in Indy come February, may order up after that, get a chance to do some more research.
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  #24  
Old 27th April 2010
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J.R. aka Jesse J.R. aka Jesse is offline
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Sportster/Buell Model: XL1200N Nightster
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Jesse, I am running a basicly stock '08 Nightster. I have added Hooker Darkside 3 step 2 in 2 pipes, SE Heavy Breather and SE Super Tuner. I had it put on the Dyno and went from 73.28 Max Torque to 80.22 Max Torque and 74.28 Max HP to 83.16 Max HP. The service writer at my HD dealer told me that a cam or head swap or both not give me much more gain. He also said the heads on the Nightster are about the best stock heads out there. what is your input on this? I am looking for somewhat more gain with her but am on a limited fixed income. Any input you may have on cam selection, cam head combo would be very helpful. Thank you for your time.

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  #25  
Old 2nd June 2010
Pigfeets DuPree Pigfeets DuPree is offline
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This fall I'm doing an upgrade with my son to my 2005 Sportster. This may even be his graduation present if he is into it. I am going to NRHS 1250 cc jugs, C&P pistons, S&S .600 cams, AMS Johnson Hylift lifters, Smith Brother tapered adjustible push rods, NRHS stage 3 heads with 1.940" intake and 1.615" exhaust, NRHS
3" offset Air Cleaner, and for exhaust I'm waiting for R&B racing
2 into 1 Prostock no-baffle pipestoarrive. I sent my 44mm Screamin Eagle CV carb to Zippers to be modified and have a Thunder jet added on to it. Still havent got that back either. I already had Baisley roller rocker arms. Datona Twin Tech TC88A ignition modual and 40,000 volt coil, I also run Nology capacitive discharge wires and Nology non-resistor Silver Plugs. After I get all my parts and complete the build I am going to tune it using R&B Racings "Air Fuel Ratio Guage" which runs off a bung on the front pipe. Why pay the dealer $125 an hour on Dyno Time. Last time it took them 3 1/2 hours. That will pay for the AFR Guage and I get to keep it forever.
"
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  #26  
Old 20th June 2011
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Sportster/Buell Model: 1200S
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Default JR Build

JR,

Nice dyno and HP you are getting from those simple mods.

A cam change to either a 497 0r SE 551 would help boost your power. Both are bolt ins with no head or piston mods needed. You would get about 85 HP and a couple of pounds of torque out of the deal. Not a whole bunch of bang for the buck but, you are limited by piston to valve clearance.

You already have the tuner, so all you need to do is have it re-tuned after the cam change.

A SE 536 would really wake that thing up but, you would have to change the pistons. With the 536 cam, you could easily get up to 90 HP with no problem. No head mods are needed with the 536 cam but, you have to change the pistons out so, that adds to the cost. A bunch of people including myself have gotten 90 plus HP with 1200's with stock TS heads and 536 cams.
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2002 XL1200S "The Black Beauty" NRHS 1250 kit CI, NRHS Stage 1 TS heads dual plugged, NRHS Hurricane Air Filter, SE 536 cams, Rich Products Thunder header, 42 Mikuni, Daytona Twin Tec ignition w/ Dyna coils. 97.4 HP, 85.5 Torque 1984 XR-1000 S&S Crank/rods w/windage tray, Vision Grinding Cylinders, Arias 11:1 compression pistons, Andrews XR-1000-1 cams, Baisley modified dual plugged heads, Rich Products Thunder header, 38mm Delortos, Daytona Twin Tec ignition w/ Dyna coils. (the never ending project but, got a 66 Barracuda drag car sucking up all the funds and time)
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  #27  
Old 16th July 2011
krazykane krazykane is offline
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Hey guys maybe you can help me out .this is what i got and i want more dont we all .so i have a 06 sporty 883 jetted carb done by me ,k&n filter stock housing with the back plate cut up .cycle shack slip ons so what should i get i want a 1200 conversion but money is alittle tight .so anything you guys can help me out with that would be great .
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  #28  
Old 18th July 2011
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Default NHRS 1212 kit

There are two basic options. Both have their pros and cons.

HD 1200 conversion kit

PROS: An excellent kit for the price. You get new pistons, rings, cylinders and it comes with 1200R heads.

CONS: Stock factory pistons limit you to a SE 497 or SE 551 cam


The NRHS or Hammer Performance 1212 kit

PROS: Excellent quality parts. High quality forged pistons and high quality rings. They bore your cylinders nice and strait. The forged pistons give you more compression and allow the use of hotter cams like the SE 536 or 575 cams.

CONS: No 1200R heads. Those are extra or you have to modify your 883 heads.

MY ADVICE: Go with the NRHS or HP kit. It allows for future modifications such as head and cam upgrades. Many folks on the forum have used the 1212 kit with stock 883 heads with excellent results. Add a bit of cam like a 497 and it makes a real nice motor. Check out the 883-1200 conversion section to see some typical builds.
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  #29  
Old 18th July 2011
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RB racing makes great products.... the wait has been known to kill an elephant. i feel your pain Dupree it took them 9 weeks for mine (lsr 2-1 with the turn out) i like the turn out, it really echos off pavement wen turning right, and thumps cars when passing, always sets off car alarms love it. lol
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  #30  
Old 6th August 2011
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zetaseven zetaseven is offline
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Sportster/Buell Model: 883
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Where do the S/E heads fit into this senario? Are they any good? I have the ones that are decked 50 thousands and S/E pistons to match 11.3 cr. Andrews n6 cams, fueling race lifters, S/E pushrods, S/E 7000 rpm ignition.Mikuni hsr42 carb. can't seem to git it tuned right. And the Andrews cams are noisy as hell. not real happy with this setup.
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