Wtf Fatboy fork springs and speedo drive?

[misfitJason]

I decided to, and built a new Fatboy style front end for my kraftech framed softail.  I had a standard wideglide on it before and picked up some takeoff legs, front wheel, and triple trees all evo model parts. I buy new dampers, fork tubes that are stock Fatboy length, aftermarket replacement springs from eastern performance (from drag) and a seal kit. 

Fast forward and I put the thing together.  The springs I got delivered are the same length as my softail standard springs.  So I think maybe they are just a different spring rate between the two pets numbers. They stuck out about three inches past the top of the tube and were a real bitch to get the tops on.  Now the damned thing has soooo much preload that it is super hard. Wth. I assume the Fatboy springs are shorter, right?  Maybe I just got sent the ring part number

Then I put the wheel on and it is offset about 8 thousandths too far to the primary side and not centered in the center of the forks because of the speedo drive!  Wth is with aftermarket parts not being to spec. I assumed a repop speedo drive would center the damn wheel right up. Nope

[tmwmoose]

If you look up a 99 FXST and a FLST on Ronnie's site they show a 46048-84 for the FXST spring and 45931-86 for the Fatboy spring. IDK Harley using different rate springs seems a little to techy for H-D lol. Also the two models have different length tubes and neither use a spring spacer so I think your Eastern spring is to long. The spring should only pop out the top around 1-1.5" least that's what stock ones did

[misfitJason]

I ordered replacements for that oem part number for the Fatboy. Maybe I'll try and find a set of takeoff springs or go with some progressives

[misfitJason]

Well the whole fork springs thing was my fault. Apparently Fatboy fork springs and softail standard fork springs are the same length.  However, I forgot that when I built the front end, I bought one inch under tubes to compensate for the raised height of the 21 inch wheel.  Looks like I am going to get a progressive kit since their springs are shorter and I can take out the distance on the spacer.

I still don't know why the speedo drive doesn't center it

[Wicked]

Speedo drives for the FX and FL softails are different #'s. Probably a different length.

[tmwmoose]

Well the whole fork springs thing was my fault. Apparently Fatboy fork springs and softail standard fork springs are the same length.  However, I forgot that when I built the front end, I bought one inch under tubes to compensate for the raised height of the 21 inch wheel.  Looks like I am going to get a progressive kit since their springs are shorter and I can take out the distance on the spacer.

I still don't know why the speedo drive doesn't center it

Well I don't know where you are with this but if your still looking for springs I have the Race techs I told ya about the springs are 13" long and the kit has a couple lengths of pvc pipe for setting up preload