Comet variator spring yellow/green 86

Snow mobile spare parts, Comet variator spring-102C / 108c / 108exp / 4 per cent.
Character color: yellow/green
OD. 50.8 mm
Length without LOAD: 86
Wire Dia: 5,3 mm
Rotary Yarn: 5.5
Required KP, compressing the spring variator 28 mm = ?
Required KP, compressing the spring variator 60 mm, n = 61