Pulls on 4500-5000 rpm - HCS Snowmobile Forums

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Old 12-07-2019, 03:37 PM   #1 (permalink)
Join Date: Dec 2019
Posts: 3
Default Pulls on 4500-5000 rpm

Hey! I just changed out my white (and a yellow line i think) primary spring since it was rusty AND it was in two Pieces. I put a red spring which is 140-320. And last season i put on a Ultimax PRO 144-4640 variator belt. I cant remember on what rpms it pulled with that belt. But this belt is longer than the old one, is that why it pulls on so high rpms or is it the spring? So i know if i should change to the backup belt or change the spring. Thanks for the help.
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Old 12-07-2019, 04:25 PM   #2 (permalink)
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Join Date: Sep 2005
Posts: 39,202
Current Sled(s): 05 600 xcsp 50th
Previous Sled(s): All of the big 4
Location: Ct.
Favorite Riding Area: Ma.
19-20 Mileage:
18-19 Mileage: not much
Age: 6
Riding Since: 70 s

Don't know the value of your white/yellow spring or who made it, but if the new red spring has a higher initial rate, or is measured differently than the old one due to who made it...yes your engagement will be higher. Different belt compounds can have an effect also on the upper rpm the sled is suppose to run at.
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