I'm big on changing to Sportster springs. Seriously, just started riding Period Piece and was headed to find the best deal on a set this morning.
PS thanks for this! I just scored a set on fleabay for $37 delivered!
Big twin makes a replacement set, this search will find sellers. "24-0905 35mm"
Did some measuring aways back and they are 15% stiffer than the stockers, and a titch longer, it's a bit of a wrestling match getting the caps back on, but worth it. I'm going to have to look for sure, I may have them installed with older fork caps that don't have the adjustable preload. (34mm fork caps are the correct fit for 35mm tubes also!) I tend to use 15 weight fork oil and like 5T use slightly more than the stock fill. IMHO The Minton mods are also an improvement over stock. Tho I'm old, I think I tend to ride more aggressively than most?
good question may be different lengths? or even weights. Guessing here''s the fitments
VT No: 24-0906 OEM No: 46052-80
Fork tube spring set features high tensile strength, ground ends.
XLS 1980-1982
FXR 1982-1983
VT No: 24-0905 OEM No: 45907-80
Fork tube spring set 35mm feature high tensile strength, ground ends.
XL 1980-1983
To add to the mystery; an old link I have points to these.
VT No: 24-0904 OEM No: 45408-75
Fork tube spring set features high tensile strength, ground ends. Overall length is 19-3/4".
FX 1976-1983
XL 1976-1983
Guess I'll report length of the one's I just snagged when they get here
Might be that fine tuning length is possible, desirable in any case.