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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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  #31  
Old 26th December 2008
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Just a headsup for anyone using the Zippers adjustable pushrod covers with the adaptor blocks that is considering doing the 1250 Kit upgrade. Once I had my 1250 cylinders on, I had to mod the very bottom cylinder fin on each cylinder.... so the Zippers adaptor block fit properly.

Just a headsup. ;0)
  #32  
Old 20th April 2009
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Use the (blue) silicon pushrod tube lower seals. I've found them much easier to slide over the pushrod tube.

If you do have problems with these seals, first glue the seal into the locator with just 3 or 4 drops of superglue. This is enough to hold the seal in place while you slide it down over the oiled pushrod tube.
  #33  
Old 14th June 2009
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Get a Yost Manifold Wrench for the intake. It made things a helluva
lot easier for a first time DIY like myself.

Wrist pin clips: A awl works well to remove them, or a tiny
eyeglass screwdriver. As per NRHS, check, double check, and
triple check that they are seated all the way in the groove.
I needed to use a magnifier to make certain but how ever you
have to, make sure they are seated.

Also get some decent torque wrenches. I got the $100
click type Craftsman. While they're not the best out there, they're accurate
and did the job well.

Consider having NRHS (or who ever does your machine work) assemble
the pistons/rings inside the cylinders. This too made things much easier
for a first timer. If I have this bike long enough to rebuild again, I would
probably try gapping/assembling rings myself now that I'm acquainted with
the rest of the job.
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  #34  
Old 14th June 2009
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Quote:
Originally Posted by mitch View Post
Revolution Performance handled the engine build. The person who actually built it was Dusty who is no longer there. I am currently employing the services of Mean Street Cycles in conjunction with Rev Perf for the rebuild.
Brian Nallin in my opinion is one of the best out there for this sort of thing. Especially if you live in the area. Of course I am aware NRHS is a sponsor of this site. I would not hesitate to pay them my hard earned money either if they were closer to me. Dan Dunn had patiently answered questions for me prior to my build and there site has a tremendous amount of info, Read it all before going big bore!

JUST so you're aware.. NRHS was originally NALLIN's Racing Head Service..

They're cut from the same cloth so to speak. can't go wrong with either. IMO.. but Dan has been an active help on these forums..
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  #35  
Old 31st July 2009
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Bump......
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  #36  
Old 5th November 2009
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Quote:
Originally Posted by chrism84 View Post
ok so here is my warning and things to look out for.....if your bike was purchased used double check the parts in the bike first before you change them......my bike a 99 883 had a 1200 ignition screaming eagle 6800 rpm limit already installed before i did the conversion, and no the bike was not already conveted haha.....so i went and bought one off ebay and now it is useless.....well just a warning for used bike owners.....and any suggestions on WHY in the hell someone would do that? i mean i ddont understand it
How did you figure that out? Mine has a S.E. ignition coil too? Mine is an 86 but also 883 not converted!
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  #37  
Old 2nd December 2013
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Quote:
Originally Posted by tonyhds View Post
If you have a 04 and up...... Don't do a conversion.

You might get lucky and it may work out for you.

Do you feel lucky ?
I have an 05 883. why do you say this?
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  #38  
Old 2nd December 2013
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Quote:
Originally Posted by rider61 View Post
I have an 05 883. why do you say this?
because back in 2007, there were some oil consumption issues with the rubbermounts upgrading.. these have been resolved by the vendors use of a different ring seal.
  #39  
Old 2nd December 2013
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Several thousand miles on my 05 NRHS 1250 conversion. No issues whatsoever, tons more power and better gas mileage than stock.
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