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comet 108 clutch spring?

S
Jan 15, 2009
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so i'm working a 600efi pow spec w/ a 108 clutch on it.
no stock from what i can tell. anyway it's tach to 4300 or so, b4 engaging.
which still seems pretty high.
it had 46gm arms, which i swapped out for 50gm/a-16 arms.
which helped drop it from 5K+, b4 engaging.
it has a yellow/white spring.
what spring is softer so it'll engage @ lower rpm?
i haven't seen a tuning manual online for clutching, so i figured i'd hit up my snowest sled heads.
 
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