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04-15-2012, 12:17 PM
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ATV Enthusiast
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Member #19481
Join Date: Oct 2011
Posts: 32
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EPI Primary Clutch Spring
I recently purchased a red primary clutch spring from EPI. Lost some low end power after installing bigger tires. Am I correct by saying that I don't need to pull the primary clutch to replace the spring?
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04-15-2012, 12:32 PM
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Polaris ATV Legend
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Member #11494
Join Date: Jan 2011
Location: Rhode Island
Posts: 2,903
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Yes. Just undo the retaining bolt and the cover bolts and the old spring will come out.
Rather be riding, instead I'm using Tapatalk
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2013 Polaris XP 850 HO LE EPS- Pure Polaris hand guards
- Polaris L&R rear box
- Ricochet Ultimate Armor (black)
- ATV GURU F&R Cobra Brush Guards
2010 Polaris 500 HO
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04-15-2012, 12:50 PM
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Extreme ATV Enthusiast
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Member #23605
Join Date: Feb 2012
Location: Virginia Beach, VA
Posts: 161
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I want to do the same with mine even though I'm running a stock setup. How did you decide what spring to go with?
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2005 Scrambler 500
2009 Trailboss 330
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04-15-2012, 12:53 PM
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ATV Enthusiast
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Member #19481
Join Date: Oct 2011
Posts: 32
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Quote:
Originally Posted by Kevin108
I want to do the same with mine even though I'm running a stock setup. How did you decide what spring to go with?
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I read somewhere on here that the red EPI primary spring is the best bang for the buck. Especially if you only have added wheels and tires. The entire kit is not necessary. I will report back with how it performs.
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04-15-2012, 01:08 PM
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Polaris ATV Junkie!
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Member #19435
Join Date: Oct 2011
Location: Florence WI
Posts: 987
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Quote:
Originally Posted by SportsmanX2
Quote:
Originally Posted by Kevin108
I want to do the same with mine even though I'm running a stock setup. How did you decide what spring to go with?
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I read somewhere on here that the red EPI primary spring is the best bang for the buck. Especially if you only have added wheels and tires. The entire kit is not necessary. I will report back with how it performs. |
Great please do that!
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07 500 EFI HO X2 Deluxe
25" Original Bighorns
Front HD Springs
Cobra II Windshield : {Money is the root of all evil and man needs roots} 
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04-15-2012, 03:06 PM
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Polaris ATV Junkie!
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Member #23200
Join Date: Feb 2012
Location: Virginia
Posts: 1,190
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I am interested in this also..good luck with it!
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04-16-2012, 04:18 AM
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ATV Enthusiast
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Member #19481
Join Date: Oct 2011
Posts: 32
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OK guys. Did the install last night. Overall it wasn't that bad to do. The most aggravating thing was getting the plastic footwell off.
I took the bike around the house this morning for a quick test run. You can definitely tell it has the low end torque back.
Now for the bad. Maybe this is completely normal but now it has a hesitation in the throttle before the bike will take off. The engine revs up and then grabs. Kinda actually jerks to be honest. Does this in both forward and reverse. Is this normal? If so, will this go away after the spring breaks in? If not, is there anything I can do to help this?
Thanks
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04-16-2012, 04:28 AM
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Extreme ATV Enthusiast
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Member #23605
Join Date: Feb 2012
Location: Virginia Beach, VA
Posts: 161
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From what I understand, those negative characteristics are the trade-off of going to a heavier spring. It takes more time to build up to the higher RPMs to overcome the initial load of the spring and begin engagement. Check the spring chart and there may be a happier medium between your stock spring and that aggressive red spring.
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2005 Scrambler 500
2009 Trailboss 330
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04-16-2012, 04:52 AM
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Junior Member
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Member #25302
Join Date: Apr 2012
Location: springville, NY
Posts: 13
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Was the red spring a patv1 ? I have one ordered for mine, just curious if it's what i can expect.
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04-16-2012, 05:12 AM
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Polaris ATV Junkie!
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Member #11247
Join Date: Jan 2011
Location: Michigan
Posts: 1,252
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I could be wrong because I am not familiar with CVTs...based on the mechanics there will be more lag and a harder hit. The engine has to rev higher before engagement, which increases lag time. When it engages, the engine is at a higher RPM putting out more horsepower at the moment the belt grabs. That is the point of the spring, that when it engages you have more power on the low end turning the heavier tires.
I have the red spring, but am not going to install it until I get new tires.
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2013 Sportsman 500 H.O. - Guru brush guard, 26" Big Horns, RDC 1/4" spacers, Viper Max 2500lb winch, EPI HD front springs
2011 Sportsman 500 H.O. - Guru brush guard, 26" Big Horns, RDC 1/4" spacers, gutted muffler, Polaris 2500, Polaris HD front springs, Polaris heated grips, Glacier III 60" plow, Quadovator reverse mod, 3 headlight mod, Polaris rear rack extender, rear L&R cargo box, HIDs SOLD
2011 Trail Boss - HIDs SOLD
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