DooZ
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Doo 1200
Here's a spring I found that may offer some benefits if the green is a bit much in the Pro4/Stm driven https://boostkinetics.com/shop?olsPage=products/arctic-cat-torsional-secondary-spring-100150-free-shipping
More of a fine tuning change vs drastic change from green to red/white
More of a fine tuning change vs drastic change from green to red/white
ClutchMaster
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Here's a spring I found that may offer some benefits if the green is a bit much in the Pro4/Stm driven https://boostkinetics.com/shop?olsPage=products/arctic-cat-torsional-secondary-spring-100150-free-shipping
More of a fine tuning change vs drastic change from green to red/white
yea that spring is probably similar to the EPI purple, and is what I’ll have to settle for fer now.
DooZ
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Doo 1200
Not familiar with the EPI purple, but it must be close to the D&D purple https://shop.ddracing.com/d-d-powersports-llc-d-d-secondary-springs-detail.htm?productId=-405389yea that spring is probably similar to the EPI purple, and is what I’ll have to settle for fer now.


STAIN
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@ 2 1/2" @ 1 7/16"
Dalton white 98 165
Cat green 96 157
EPI purple 86 148
Cat red/white ??? 116
I cant find the start rate for the CAT red/white but the finish is pretty low
Dalton white 98 165
Cat green 96 157
EPI purple 86 148
Cat red/white ??? 116
I cant find the start rate for the CAT red/white but the finish is pretty low
ISLANDRACING
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I found the specs for the RED/WHITE 68/116@ 2 1/2" @ 1 7/16"
Dalton white 98 165
Cat green 96 157
EPI purple 86 148
Cat red/white ??? 116
I cant find the start rate for the CAT red/white but the finish is pretty low
Also some specs for the D&D springs:
D&D Grey 67/123
D&D Purple 83/140
Last edited:
showtime
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Very good info ,i have hurricane ss tunes ,tapp and stm with button cover instead of roller ,only diff . is i have 9000 2017 cat .
showtime
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Have tapp black spring, number 2 rollers, set on a on cam, 3 on clickers, 52\44 with purple in centre hole on stm ,xs825 , pulls 8900 0n 285 stock muffler tune ,happy with set up


STAIN
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Wow. Surprised you can pull RPM with that set up. More to consider.....Have tapp black spring, number 2 rollers, set on a on cam, 3 on clickers, 52\44 with purple in centre hole on stm ,xs825 , pulls 8900 0n 285 stock muffler tune ,happy with set up
Crossfire12
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steeper angle, spring pressure balance, not pressuring a flat angle causing super squeeze on belt .


STAIN
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Is that the EPI purple secondary spring?with purple in centre hole
THEPASMAN
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Where does the dalton B/O fall in that line up of springs. Also the stock yellow. Just wondering
Thanks Brent
Thanks Brent
J & J Racing
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Remember this is a button coverWow. Surprised you can pull RPM with that set up. More to consider.....
Can pull probably 4 degrees more than roller or so
Still 40 finish with roller
I liked 38 to 40
showtime
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Thinking dalton ,come from HurricaneIs that the EPI purple secondary spring?


STAIN
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That makes a little more senseRemember this is a button cover
Can pull probably 4 degrees more than roller or so
Still 40 finish with roller
I liked 38 to 40

KnappAttack
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Thinking dalton ,come from Hurricane
EPI purple secondary spring comes from Erlandson Performance.
It is NOT a Dalton spring. Dalton has a Cat white which is the exact spring as a Cat green, both of which is a bit more pressure than the EPI purple.
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