05 Nightrain Lower End Rebuild - Harley Davidson Forums: Harley Davidson Motorcycle Forum
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Old 08-31-2011, 09:39 PM   #1 (permalink)
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05 Nightrain Lower End Rebuild

Hey Guys,

I own a 05 Nightrain with 62000 miles on it. My mechanic put a 95" big bore kit in it less than 20,000 miles ago. Got great results out of the upper end rebuild and my mechanic said the lower didn't need to be rebuilt. Well, my lower grenaded on me and my oil filter is full of metal. Mechanic said it is most likely my flywheel and it is fairly common with that year. Of course, his wife (office manager) is not very helpful because I want to do the work myself. They are wanting $4000 to fix it and that is an estimate-they won't give me an actual quote.

I guess I am looking for ideas/prices/kits that would work or that I will need to rebuild my lower end so I don't have to trash the top end. The top end was bored out and 95" S&S pistons were installed.

I have been all over the web and am swimming with information but need some clear direction and what would be best. I am also looking at installing a Timken conversion but not sure what I need there either.

Any help or information would be greatly appreciated.
Thanks Mike
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Old 09-06-2011, 10:58 AM   #2 (permalink)
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Wow, Thanks for the help guysl. 38 people have read my post yet not one F%^&**G reply.
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Old 09-06-2011, 11:09 AM   #3 (permalink)
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Crank/rods are not rebuildable, nor worth it really, IMHO. You can look at S&S flywheels/rods, unless you find another 88 crank and rods to replace it, but have it reworked, welded/indexed and a Timken bearing conversion which you mentioned.

Kirby (Prodrag1320) and Scott (Hillsidecycleco) are two people here that can help you, as they do this for a living.

I'd be reader #39.
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Old 09-06-2011, 11:10 AM   #4 (permalink)
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Sounds like a good time for the 120" kit.
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Old 09-07-2011, 11:54 PM   #5 (permalink)
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Thanks for the reply Dave63. I was planning on replacing the crank/rods and as you mentioned, I would like an S&S. What would you recommend? I saw S&S has a kit. Once again, thanks for the input.

Mike
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Old 09-07-2011, 11:56 PM   #6 (permalink)
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Kainam-120" kit would be nice but I have to squeeze my pennies
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Old 09-14-2011, 12:20 PM   #7 (permalink)
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I was told I can put a stroker 103 flywheel in and not have to change the top end. Is that true or does that sound off? Gonna crack it open the end of the month to see what kind of a mess I have.
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Old 09-14-2011, 01:28 PM   #8 (permalink)
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Quote:
Originally Posted by Nighttrain2005 View Post
I was told I can put a stroker 103 flywheel in and not have to change the top end. Is that true or does that sound off? Gonna crack it open the end of the month to see what kind of a mess I have.
Yeah, the bore is the same size between 95" and 103" (3.875"), only thing different is the stroke, going from 4.00" on the 95" increasing to 4.375" on the 103".


I sure would be tempted to put the 4.625" crank out of the 120" kit in there tho.
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Old 09-15-2011, 06:31 AM   #9 (permalink)
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.............our you can install a 4 1/2" S&S crank, with a 3.875"(95") bore, and have yourself a 106"er.
Combined with a good cam, and the proper cylinder heads,
110 hp, and 120 ft/lbs should be within reach.
Scott
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Old 09-15-2011, 08:06 AM   #10 (permalink)
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I'd be taking Scott's advice, His shop does this for a living and he's built enough motors and provided countless recommendations to people on this site, as well as many other forums I see him on.
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