Hello. I would like to put an late model factory swingarm on my 2000 softail frame. I would like to put a '05 or later factoryswingarm on my 2000 fatboy so I can have a wider tire without having to buy one of the megabuck kits. I know the fender struts will need to come off and that doesn't matter as I plan on replacing the fender anyway. Just wondering if it can be done. The factory part number for the 2000 swingarm is 45573-00 and for an '07 is 45573-00A. Are the bearings the same? There's more... What kind of offset or transmision mainshaft length is used to keep everything centered and able to run a 200 rear? I'm sure that a kit would make it easy but the winters are long and I like to tinker. Thanks for any help.

 

let me know how it turns out, im doing a simaler project and i want the look w/out blowing the bucks on a kit.

 

[align=left]The swingarms are the same 00-05. For some of the 06-07 Softail models (Standard, Nightrain, etc), they changed the tab the brake caliper mounts to, put a narrower belt/pulley on, and modified the frame horns a bit; but the swingarm is still the same width.

A while back (maybe a year or so???), someone here on HDForums used parts from an 06 or 07 to mount a 200mm tire on his bike using his original swingarm, but I don't recall who it was. In fact, if memory serves, I think he even used his original one-piece caliper by shaving some of it off to fit.
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Dave is right, the swing arm is the same width the brake mounting tab is shaved on the fat tire swing arms. Do a search, this was one of my first questions when I got here.