09 shift 600 not running right - HCS Snowmobile Forums

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Old 11-12-2013, 06:59 PM   #1 (permalink)
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Question 09 shift 600 not running right

I have a 09 carbed 600 shift with 3000 miles. Main jet 390 needle set at number 2 and 35 pilot jets. No other carb adjustments from stock. Sled runs good from half throttle to wide open. But if you go from a dead stop to wot its not very crisp like it's down on power. If your riding it at 1/8-1/4 throttle it runs gargaly and if you go to wot from 1/4 throttle it has that not crisp feeling again. On the stand it runs great with no bogs or stumbles. Temps out tonight 28*F My last ride of last year I got a tank of bad gas don't known if this would have any effect on the sleds run quality now. With 3000 miles wondering if this would be a clutch and reed problems? Put new plugs in it and they look fine. Even with stock jetting at 1/8-1/4 throttle the sled sounded like it was gargling like it was running rich. Any Hcs input would be great.
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2009 Polaris IQ Shift 600 RydeFx front track shock, fox rear track shock 3.25inch bar riser

2012 ski-doo TNT 600 Carb
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Old 11-12-2013, 07:02 PM   #2 (permalink)
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Both cylinders are at 120
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Old 11-12-2013, 08:40 PM   #3 (permalink)
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sounds like a partially plugged pilot jet.

pull your float bowls, and see what they look like inside. Clean the carbs, and blow out all the passages.

drain the tank, suck it dry, and put NEW FRESH gas in.
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Old 11-12-2013, 09:19 PM   #4 (permalink)
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Had the float bowls off a month ago when I put the 390 main jets in. Float bowls were clean.
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Old 11-12-2013, 09:33 PM   #5 (permalink)
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I would bet some sort of belt or clutch issue? how many miles on the belt? is the deflection right? might be time for new clutch springs? I would pull the clutches disassemble them and inspect. replace anything worn and the springs regaurdless of how they look. get a new belt and check clutch alignment anytime you take them off and reinstall. set the belt deflection right.
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Old 11-12-2013, 11:15 PM   #6 (permalink)
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I have a 2008 Shift (2500 miles) and was having some issues (not crisp after backing off throttle and getting then gradually getting back into it) and this past spring when I post and pre-seasoned it, I found that the secondary spring had broken. Not saying that's your problem but you might check your secondary.
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Old 11-13-2013, 05:19 AM   #7 (permalink)
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I wonder if the springs are getting weak since it runs fine on the stand. But when ridding it the sled acts up maybe because the clutches are under load?
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Old 11-20-2013, 11:06 AM   #8 (permalink)
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35 Pilots are too small. Should have 45's. Sled/carbs not getting enough fuel at 1/8 to 1/4 throttle, thus the hesitation (gargling) you are experiencing. With proper fuel flow it should pull strong and or rev freely throughout. The 2008 Shift 600 came factory with 45 Pilots and 400 Mains. Tad rich with the 400's at 1000 ft altitude and 20 degree and warmer conditions... But wicked perfect at 0-15 degrees. So, protect your mid range lean condition poo's are famous for and put 45 pilots back in. Thank me later. :-)
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Old 11-20-2013, 11:37 AM   #9 (permalink)
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Current Sled(s): 15 AXYS 800/ 09 shift 797/ 06 fuse 600
Previous Sled(s): Lots of everything
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Favorite Riding Area: the bedroom YEEHAW!!
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12-13 Mileage: 1930+
11-12 Mileage: 1700+
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Age: 51
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Quote:
Originally Posted by wirth315 View Post
35 Pilots are too small. Should have 45's. Sled/carbs not getting enough fuel at 1/8 to 1/4 throttle, thus the hesitation (gargling) you are experiencing. With proper fuel flow it should pull strong and or rev freely throughout. The 2008 Shift 600 came factory with 45 Pilots and 400 Mains. Tad rich with the 400's at 1000 ft altitude and 20 degree and warmer conditions... But wicked perfect at 0-15 degrees. So, protect your mid range lean condition poo's are famous for and put 45 pilots back in. Thank me later. :-)
I disagree, I had 25 pilots in mine to get rid of a low end burble! (When mine was stock yet.) Also ran 380 mains and needles in the #2
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Old 11-20-2013, 05:30 PM   #10 (permalink)
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I have a 08 shift, 200 ft. above sea level, run 91 premimium and always add an additive (howes fuel conditioner). I also add (sea foam) to my first tank of the eason. have 6000 miles and never had a fuel issue. no bogging or hesitation at any speed.
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