I don't know the spring length but you can adjust your Intiminators by adding or removing shims.
I don't quite know how it works but Im sure if you called Ricor and gave them your info and told them what you were feeling they could help guide you.

SOLD: 07 Black BA, 39mm FCRs, TPUSA stage 1 head, TPUSA 813 cams, TPUSA 10.8:1 pistons, TTP #3 igniter, Specialty Spares Long Cannons, Tsukayu Hard Bags. 82HP/55tq NEW: 19 Goldwing Tour DCT