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Old 03-16-2007, 10:14 AM   #1 (permalink)
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Join Date: Aug 2005
Posts: 470
Current Sled(s): 1200 4 Tech Ski-Doo
Previous Sled(s): Ski Doo 550F,600 XLT POLARIS, 600ZRT CAT
Location: AVERILL PARK, NY
Favorite Riding Area: CANADA
13-14 Mileage: 1,005.6
12-13 Mileage: 760
10-11 Mileage: 960
Age: 58
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I'm looking to beef up my rear suspension, heard about big boy springs and need to locate them. Any ideas?
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Old 03-16-2007, 12:46 PM   #2 (permalink)
ext
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Join Date: Dec 2002
Posts: 675
Current Sled(s): 2009 TZ1 TURBO LXR
Previous Sled(s): 1999 ZRT 900, 1986 EXT,1981 EL TIGRE
Location: Nova Scotia ,Canada
Favorite Riding Area: NEW BRUNSWICK/QUEBEC
12-13 Mileage: 2000
11-12 Mileage: 1500
10-11 Mileage: 2000
Age: 48
Riding Since: 1976
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Arctic cat is where I got mine.
I forget the part number but any dealer can look them up for your model sled.
I go 300 lbs in my gear.
I also revalved my rear shocks to snopro specs.
A WORLD of differance.
I found with just the heavy springs the rear was a bit bouncy in the rough stuff(no bottoming though).
Once the shocks were done it was a different machine.
Money well spent.
Also a point to think of.
The heavier springs put alot more load on the plastic spring sliders.
I was going through 2 sets a year.
They are a pain to change.
I bought the aluminium ones and have not had a problem since 4500 miles on em and still little or no wear.
I think mine came from EPI if I remember .It was 4 years ago.

Hope this helps.
I also run the aluminum spring adj blocks.
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Hold it to the pin till you are either out in front or she blows!!!!!!!!!
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Old 03-16-2007, 10:57 PM   #3 (permalink)
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Here is Cat's spring chart. I tip 300+. check out the part # on Brown's Leisure for price and upgrades.

This should be stiffest to lightest.

0604-290/291 0.490 60 9 5.02 17.5 4.5
0604-134/135* 0.468 85 9 5.03 16.5 5.75
0604-118/117 0.460 45 9 4.75 17.5 4.5
0604-288/289 0.460 60 9 4.75 17.5 4.5
1604-067/066 0.460 75 8.75 4.83 18 5.5 These are the best for my ZRT.
1604-060/061** 0.460 77 8.75 4.85 20 5.5
1604-149/148*** 0.460 77 8.75 4.84 22 8
0704-886/887** 0.460 77 8.75 4.85 20 5.5
0604-592/593 0.460 83 8.75 4.8 15.75 5.5
1604-224/225** 0.460 83 8.75 4.53 21 5.7
0604-314/315** 0.460 90 9 5.03 17.5 5.5
1604-194/195** 0.460 90 8.75 4.53 16 6.7
1604-076/077** 0.460 97 9 4.53 16 5.7
1604-388/389** 0.452 75 8.75 4.6 18 5.5
1604-604/605** 0.452 75 8.75 4.62 18.75 5.5
0704-944/945** 0.452 75 8.75 4.62 18.75 5.5
1604-381/380*** 0.452 77 8.75 4.97 22 8
1604-442/443 0.452 90 8.75 4.53 16 5.7
2604-044/045 0.452 90 8.75 4.68 18.75 5.5
0704-938/939 0.452 90 8.75 4.53 16 5.7
0704-822/821 0.452 90 8.75 4.75 18.75 5.5
0604-282/283 0.437 75 9 4.8 17.5 5.5
1604-062/063** 0.437 75 8.75 4.6 18 5.5
1604-739/740** 0.437 75 8.75 4.6 16 5.5
0704-888/889** 0.437 75 8.75 4.6 18.5 5.5
0704-908/909 0.437 75 8.75 4.6 18.5 5.5
1604-144/145*** 0.437 77 8.75 4.52 22 8
1604-050/051** 0.437 83 8.75 4.59 16 5.7
1604-078/079** 0.437 83 8.75 4.56 21 5.7
1604-608/609 0.437 83 8.75 4.59 20.75 5.7
0704-856/857 0.437 83 8.75 4.59 20 5.7
0604-132/133* 0.437 85 9 5.03 16.5 5.75
0604-272/273 0.437 90 9 4.8 17.5 5.5
0604-454/455* 0.437 90 9 4.8 17.5 4.5
0604-654/655** 0.437 90 8.75 4.59 20 5.7
0604-660/661** 0.437 90 8.75 4.59 18.1 5.7
0704-988/989** 0.437 90 8.75 4.59 18.1 5.7
0704-968/969**** 0.437 90 6.75 3.5 18.5 5.12
1604-065/064 0.421 75 8.75 4.45 18 5.5
1604-178/179** 0.421 77 8.75 4.52 20 6
1604-146/147*** 0.421 77 8.75 4.52 22 8
0704-990/991* 0.421 77 8.75 4.32 20 5.5
0604-774/775* 0.421 90 8.75 4.43 18.1 5.7
0604-970/971* 0.421 90 8.75 4.43 15.9 5.7
1604-706/707 0.406 6 4.48 2.45 6.03 4.57
0604-054/053 0.406 65 7.75 3.88 17.5 4.5
0604-400/401 0.406 90 8.75 4.32 17.5 5.5
0604-474/475 0.406 90 7.75 3.88 17.5 4.5
0604-492/493 0.406 90 8.75 4.32 15.75 5.5
0604-584/585 0.406 90 8.75 4.32 18.1 5.7
0704-986/987 0.406 90 8.75 4.32 18.1 5.7
1604-818/819**** 0.405 75 8.75 4.32 19 5.5
2604-306/307 0.405 75 7.75 3.91 19 5.5
0704-892/893**** 0.405 75 8.75 4.32 19 5.5
0704-902/901**** 0.405 80 7.75 3.92 19 5.5
2604-356/357 0.405 90 5.75 3 18.5 5.12
0704-924/935**** 0.405 90 5.75 3 18.5 5.12
0604-746/747 0.390 90 8.75 4.32 19.75 5.7
2604-352/353 0.375 80 5.75 3 18.5 5.12
0704-926/927**** 0.375 80 5.75 3 18.5 5.12
1604-616/617**** 0.375 90 5.75 3 15.62 5.12
0704-876/877**** 0.375 90 5.75 3 15.62 5.12
1604-600/601**** 0.359 90 5.75 3 15.62 5.12
0704-890/891**** 0.359 90 5.75 3 15.62 5.12
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Old 03-19-2007, 06:55 AM   #4 (permalink)
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Join Date: Aug 2005
Posts: 470
Current Sled(s): 1200 4 Tech Ski-Doo
Previous Sled(s): Ski Doo 550F,600 XLT POLARIS, 600ZRT CAT
Location: AVERILL PARK, NY
Favorite Riding Area: CANADA
13-14 Mileage: 1,005.6
12-13 Mileage: 760
10-11 Mileage: 960
Age: 58
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Thanks, good info.
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