2003 fatboy engine
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Joined: Aug 2011
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From: nova scotia
2003 fatboy engine
Hi Guys, just wondering if anyone knows if it's a big job to change my 2003 fatboy 88ci over to a 96 ci ? I have a brand new set of 96ci cylinders and pistons, What else do I need and is it a good idea or am I just asking for problems ?
Thanks
Thanks
Seasoned HDF Member
Joined: Nov 2010
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From: Oxford, Nc
The 96 " pistons and cylinders are for a 4.38" stroke, yours is 4". That's why the 96 is no longer an 88. So no, they won't work.
However, a 95" upgrade ( pistons and cylinders,) for your 88 is relatively inexpensive, and will work
However, a 95" upgrade ( pistons and cylinders,) for your 88 is relatively inexpensive, and will work
Outstanding HDF Member
Joined: May 2009
Posts: 2,932
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From: Broomfield, CO
Exactly! Unless you want to spend a lot of money for a new flywheel, just have your current cylinders bored and get the corresponding pistons to bump it up to 95 cubic inches,
Road Warrior
Joined: Dec 2008
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From: Linden, NC
"The 96 " pistons and cylinders are for a 4.38" stroke, yours is 4". That's why the 96 is no longer an 88. So no, they won't work."
About says it all. If you're looking for increased performance, consider a 95", or if you prefer more cubes, 98" big bore kit. Both will kick a 96" motor squarely in the nuts.
Many good shops offer both 95" & 98" big bore conversion kits, comes with everything you need, or you can send them your cylinders and heads for boring and headwork.
Hillside Cycles, a forum sponsor, does both. Or just google 95" or 98" Big Bore kits.
About says it all. If you're looking for increased performance, consider a 95", or if you prefer more cubes, 98" big bore kit. Both will kick a 96" motor squarely in the nuts.
Many good shops offer both 95" & 98" big bore conversion kits, comes with everything you need, or you can send them your cylinders and heads for boring and headwork.
Hillside Cycles, a forum sponsor, does both. Or just google 95" or 98" Big Bore kits.
Last edited by Weevil; Sep 4, 2011 at 04:14 AM.
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