121 to 136 - HCS Snowmobile Forums

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Old 02-27-2011, 12:18 PM   #1 (permalink)
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Default 121 to 136

going to turn my 121 apex into a 136, what do i need, do I need to trade my er rear cooler for an attack one? thanks.
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Old 02-27-2011, 02:41 PM   #2 (permalink)
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Current Sled(s): 2007 YAMAHA ATTAK & 78 ET 340
Previous Sled(s): APEX RTX ,SRX 700, XLT 600, Ski Whiz 440
Location: Salt Springs Nova Scotia
Favorite Riding Area: Cape Breton Highlands
12-13 Mileage: 2000
11-12 Mileage: 500
10-11 Mileage: 2460
Age: 44
Riding Since: 1976
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I streathed mine and used 2 6 inch long pieces of aluminium pipe to allow for the extra length. It would look better with the right cooler but that's all I did to make it work. You'll never own a short track again, it's a wicked upgrade. Make sure the extention kit you get allows for the longer hyfax, some keep the regular hyfax and I wouldn't reccomend them.
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Old 02-27-2011, 09:25 PM   #3 (permalink)
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thanks duste. i'm into a major overhall including engine work. i think an attack cooler would be the way to go.
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Old 03-07-2011, 08:17 AM   #4 (permalink)
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Current Sled(s): 2012 XF1100 Turbo, 2011 Ace Renegade (Son's S
Previous Sled(s): 08 Apex GT, 91 Phazer II, 88 Sno Scoot, 82 ET300
Location: CBS, NL. Canada
Favorite Riding Area: Central Newfoundland
11-12 Mileage: 1500 Miles
10-11 Mileage: 500 Miles
Age: 44
Riding Since: 1972
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I used muffinworks kit to stretch mine to 144. Best thing I have ever done. A friend also did his to 136 and he is happy....not as happyas me but happy.
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Old 03-10-2011, 07:24 PM   #5 (permalink)
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Current Sled(s): 2008 Yamaha Apex GT LTX
Riding Since: 1978
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Helped my buddy do his extension kit and it was a breeze. We never had to touch the coolant system at all
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Old 03-10-2011, 08:06 PM   #6 (permalink)
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I like to have something back there. if i can't score a cooler i might go with the alunium pipe. thanks all.
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Old 03-14-2011, 03:03 AM   #7 (permalink)
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Join Date: Mar 2011
Posts: 333
Current Sled(s): 2013 xf 1100 turbo high country
Previous Sled(s): 2001 yamaha sxr 500. 2006 apex rtx 144"
Location: East bethel mn
Favorite Riding Area: anka/isnti, n shore, st croix
10-11 Mileage: 2500
Age: 28
Riding Since: 1989
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Stretched mine to 144 tip up from muffinworks. The hardest part was putting the new track on. No coolent issues with stock.


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