Surely someone has access to a Yamaha clutch spring and weight chart? I would love to order a new Yamaha shop wall chart if I had the Yamaha part number.
Is there a simple way to decode Yamaha primary springs? I'm mostly used to Doo springs with two spring rates at different heights. (ex, 160-280) You want a softer engagement buy a lighter start rate #. Want more full shift RPM, buy one with higher second rate #.
Yamaha's springs: Pre-load, Spring Rate, Total Force, Free Length, and Wire Diameter.
By the chart the CENTER color is the preload amount. The LEFT and RIGHT side colors are the spring rate.
Pink = 30kg
Silver = 35kg
Green = 40kg
White = 45kg
Brown = 50kg
So, for example I want a softer engagement spring than stock (Grn/Grn/Grn) do I go with a spring with less preload? Or if I want a spring with softer finish rate would I go off spring rate or total force?