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stm motard slipper clutch spring rates?
Posted: Sun Jan 17, 2010 1:03 pm
by abmjl
hi Ken,i bought a stm slipper cluthch for 450r 04 motard off you a couple of years ago # 0F3OR230B1100MX n am very happy with. ive have somehow broken the secondary spring rated 50kg #0F3SR540B140006. thing bout replacing it with a 40kg spring now. wots your thoughts?
judging by the clutch part # i think the springs mite be rated for MX use, do you know wot the SM spring rates are for these cluthchs? the primary spring i have is 160kg.
thanks
Jason.
Posted: Sun Jan 17, 2010 1:53 pm
by Asmith
Going to a lower rated secondary spring would only lower the amount of engine braking.
It shouldn't affect acceleration as that's the primary springs role.
Are you sure that you've got a 50kg in there?? The 85mm that you describe is rated at 40kg...
Posted: Sun Jan 17, 2010 2:27 pm
by abmjl
yes the spring is 85mm 50kg im looking at it now n just to conferm the part # on the side of it is 0F3SR540B140006. n the clutch part # is F30R230B1100MX.
Posted: Sun Jan 17, 2010 2:43 pm
by Asmith
Running a 40kg will just reduce the engine braking characteristics of the clutch. The replacements run about $ 62.00.
They have them all flavors for fine tuning from 30kg to 80kg.
Posted: Sun Jan 17, 2010 2:46 pm
by abmjl
do you guys sale the individual springs?
Posted: Sun Jan 17, 2010 2:54 pm
by Asmith
I don't know if Ken stocks them, but he should be able to get them for you. Blast him an e-mail to
ken at crfsonly dot com and he'll hook you up.
Posted: Sun Jan 17, 2010 2:58 pm
by abmjl
will do, cheers man.