blacksheep23 wrote on 07/19/08 at 17:43:27:Hey I'm fixin to do this mod to.Where do you get the mount plate to mount the springs?Does the stock mount fit the front part of the seat or do I have to modify it?
(from an IM)
What I wanted to, and did, was avoid any modifications to either the bike or the seat.
Part A is 1" x 1/8" bar stock from Lowes Hardware, two slightly more than 90 degree bends to fit the stock seat mounts. Square didn't quite work, so I grabbed the short tabs with a pair of ChannelLocks and added a slight twist so that the bar fit within a 1/16".
Originally that was the sum total of the rear mount, with the cross part of the bar horizonal instead of the pictured vertical, with the seat springs bolted to that bar. The original front mount was 4" tall. That setup positioned the seat up and back about 2 1/2- 3 inches. Wendy with her 36" inseam liked it, I didn't.
Plan B involved swapping the rear mount left/right and rotating 90 degrees, bolted up just the same as before.Found some 2" angle iron, sliced a couple of short pieces, drilled a few holes, made the pictured spring perches. The six bolts connecting part A are all 1/4", the bolts connecting the springs are 5/16", all with NyLock nuts.
The front mount is simply another piece of that 1" x 1/8" barstock drilled to match the stock front mount. The upright U is more barstock torch-bent over a 1.5" thick concrete stepping stone and welded to the bottom piece. A 5/16" bolt serves as the pivot, a 1.5" spacer keeps things centered, and the use of a pair of nuts jammed together leaves the front of the seat free to pivot. Final version has the centerline of the pivot bolt 1.75" above the bottom of the mount. I ran out of the 1" so I used some 3/4" barstock I happened to have around.
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