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Carls Cycle 660!!!

0neoldfart

Well-known member
Premium Member
Nov 27, 2007
968
574
93
Thorsby, Alberta
You really have to ride one...

I don't doubt that the Carls 660 runs very well...but I could never understand why somebody would buy a 600 and put the extra money into it, only to have it "run toe to toe" with an 800...Most people would agree there slightly lighter and have a different feel because of the smaller displacement, but I just don't see it.
Unless you ride one, you won't "see it'. I've had 800's for years, and a few big bore and boosted sleds (my current ride is an EVO equipped M1100T). Does the 660 have the torque of an 800? No. Will it keep up to an 800? No problem, unless your riding is at 10,000' doing straight up chute climbs. The fact that it will go toe to toe with Cat's 800 HO (which has a "bit" more snap then the Polaris 800) is impressive in itself. Anyone who thinks the current Liberty 800 in stock form will hang a beating on a Cat 800 HO has been drinking too much poo-lade, or the rider on the Cat can't ride. That said, it isn't a sled for everyone - most riders depend on the torque of a sled to get them out of a bind rather then depending on talent - my wife has embarrassed more then a few guys on the hill (funny what 20 yrs experience will do for ya). She chose the 600 platform simply because of the 800's poor track record of reliability, and the lighter "feel" (She tore her rotator cuff before the 2013 season, so wanted a lighter sled).
In short, it revs like a blender - kind of like a 125 two-stoke MX bike vs. a 250, feels very light, and is playful. If you like to challenge yourself and are a decent rider, you can hang a beating on the other stock 800 pilots in your group, and have more "fun" doing it on a lighter, more nimble sled... just go ride one and you'll figure it out.
 

WyoPro

Well-known member
Lifetime Membership
Sep 19, 2008
652
295
63
39
Laramie, WY
Unless you ride one, you won't "see it'. I've had 800's for years, and a few big bore and boosted sleds (my current ride is an EVO equipped M1100T). Does the 660 have the torque of an 800? No. Will it keep up to an 800? No problem, unless your riding is at 10,000' doing straight up chute climbs. The fact that it will go toe to toe with Cat's 800 HO (which has a "bit" more snap then the Polaris 800) is impressive in itself. Anyone who thinks the current Liberty 800 in stock form will hang a beating on a Cat 800 HO has been drinking too much poo-lade, or the rider on the Cat can't ride. That said, it isn't a sled for everyone - most riders depend on the torque of a sled to get them out of a bind rather then depending on talent - my wife has embarrassed more then a few guys on the hill (funny what 20 yrs experience will do for ya). She chose the 600 platform simply because of the 800's poor track record of reliability, and the lighter "feel" (She tore her rotator cuff before the 2013 season, so wanted a lighter sled).
In short, it revs like a blender - kind of like a 125 two-stoke MX bike vs. a 250, feels very light, and is playful. If you like to challenge yourself and are a decent rider, you can hang a beating on the other stock 800 pilots in your group, and have more "fun" doing it on a lighter, more nimble sled... just go ride one and you'll figure it out.

Yeah, I've ridden several.
 

sledhead_79

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Lifetime Membership
Mar 2, 2009
617
366
63
Wyoming
Just got done looking at the Primary clutch for ya. Black spring #7043342 140/330 with 60 gram belly busters. Pulled 8150 rpm at Cooke over the weekend. Ran great at Cooke City, Big Horns, and also Snowies.
 
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ak

Well-known member
Dec 7, 2007
2,776
723
113
Carl's runs a gold secondary spring and a custom helix with two cuts on the helix
for the 600 and 660 sleds.
 

dpfost

Member
Premium Member
Nov 27, 2007
147
9
18
Glad to hear the 660 is running good Sledhead!!! 660's are just a blast to ride. Have owned several 660's over the years from Carls and no issues.
 
V

volcano buster

Well-known member
Nov 26, 2007
4,221
1,613
113
Stayton Oregon
What secondary is run on these newer 600/660's?

I've got a 2010 with the P2 secondary and run the black purple spring with a Switchback helix.
 
A

ak

Well-known member
Dec 7, 2007
2,776
723
113
Team tss04 secondary, the stock secondary.
 

machinest660

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Lifetime Membership
Dec 7, 2008
423
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Saskatchewan Canada
Well after a few years of debating another 660 build I decided to do it, picked up a 2012 rmk 600 and will be sending the motor to carls cycle for the 660 kit along with the case porting, clutch machining and balancing. Cant wait to line it up with my 2011 pro 800 and see how they compare, the last 660 i had was in a 06 rmk 144 and that sled was just a blast to ride, my 09 assault didn't even come close to catching the 660. I will post my complete setup in a few weeks when i get all the parts back :face-icon-small-hap
 
A

ak

Well-known member
Dec 7, 2007
2,776
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How much extra for the case porting and what kind of gains is there?
 

machinest660

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Lifetime Membership
Dec 7, 2008
423
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Saskatchewan Canada
its a extra 350 for the case porting. Chris didnt say any numbers but said it will definitely make a difference with them opened up. so I said what heck might as we give it a try.
 

eyefish123

Well-known member
Premium Member
Apr 6, 2010
511
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43
Northern Idaho
Please be sure to post the results of your new motor. I am very seriously considering going to a 660 next year from my XM 800. (I have absolutely no complaints about my XM, just thinking I might want to try the 660. I have heard they are a blast to ride.) I have heard nothing but good about them and the more good I hear the more likely I am to make the switch next year.
 

machinest660

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Lifetime Membership
Dec 7, 2008
423
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28
Saskatchewan Canada
Please be sure to post the results of your new motor. I am very seriously considering going to a 660 next year from my XM 800. (I have absolutely no complaints about my XM, just thinking I might want to try the 660. I have heard they are a blast to ride.) I have heard nothing but good about them and the more good I hear the more likely I am to make the switch next year.

Yup I sure will, I will probably start a thread of all the mods I am gonna do to the sled along with reviews of the products. :face-icon-small-hap
 
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