eingine big bore kit

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Apr 28, 2011 | 01:59 PM

jasonleahey

Thread Starter

Cruiser

Joined: Feb 2011

Posts: 230

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From: APO , Thailand

eingine big bore kit

ok .. just for the sake of askin a buddy of mine is doin a 88 to 95?? engine upgrade with a kit and it got me thinkin how much i can go up with mine

so i looked it up and it looks like for the 2011 Fatboy you can upgrade from a 96 to a 103 .. but then i see the 110 .... is the 110 possible from the 96 ( with direct bolt on ) and even at that is the 103 ( with direct bolt on ) ?

just my curiosity

Apr 28, 2011 | 02:09 PM

Sgt_Jim

Stellar HDF Member

Joined: Feb 2011

Posts: 3,048

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From: Central Jersey

how about splitting the difference and going with a 106"

http://www.sscycle.com/feature/featureview.php?s_id=12

...otherwise yes it's possible, and it's $1500.. p/n 27508-11

http://www.harley-davidson.com/gma/g...bmLocale=en_US

(at the bottom)

Apr 28, 2011 | 02:50 PM

Hippiebeads

Tourer

Joined: Jul 2010

Posts: 316

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From: Eaton,Ohio

Cubic inches are only limited by your wallet.

Apr 28, 2011 | 02:58 PM

kk6pg

Outstanding HDF Member

Joined: Nov 2007

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From: Beautiful Downtown Burbank

If you exclude the minor case modifications, then the 110 kit is a direct bolt on.

Apr 28, 2011 | 03:25 PM

jasonleahey

Thread Starter

Cruiser

Joined: Feb 2011

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From: APO , Thailand

ok that was my question def dont want to drill or cut into a new engine ... so then is the 103 a bolt on ?

Apr 28, 2011 | 03:32 PM

fcsallan

Road Warrior

Joined: Jun 2010

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From: Sunny South Florida

The 106 in the link up there ^^^^^ is a direct bolt on with no machining needed as well. But yes, the 103 also requires no machining.

Apr 28, 2011 | 03:39 PM

djl

HDF Community Team

Joined: Jun 2006

Posts: 12,791

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From: san antonio

The 110" is not a bolt on modification; case boring is required. That will require removing the lower unit, splitting cases, removing crank/wheels, reassembling and boring cases for the larger cylinder spigots. So, in addition to the $1500, you are looking at the cost to R/R and split the cases and the cost of the machine work. If going 110" and cases are split, one would be crazy not to have the crank trued, balanced and welded and the Lefty crank bearing installed. So now you are talking mo money. If one was going to spend that much, spring for the 120R kit.

You can have your cylinders bored to 3.932" to fit aftermarket pistons and have a 107" with no case mods; that's the way to go if you are looking for max bang for the buck.