sled problem - running crappy started by big113
	December 13th 2008 at 8:31 PM Post #1
	big113 xracer 20 Posts Group: Members Member Since: September 25th 2008 Location: Sauk Centre, Minnesota Current Sled: 05 IQR
	hey guys i put a 600 ho outta 2006 polaris switchback from emerson stahl came with everything i need motor carbs cdi wiring put this in my old 440 iq race chassis i got everything done up and running but when i am running it reving it up engage the clutch it starts to back fire and a flame shoots from the pipe i took out the plugs they were wet put new ones in and it does the same thing i have 420 jets in there any ideas whats going on it idles fine? Rating: 0 Quick Edit Edit Topic

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	December 14th 2008 at 12:39 PM Post #2
	big113 xracer 20 Posts Group: Members Member Since: September 25th 2008 Location: Sauk Centre, Minnesota Current Sled: 05 IQR
	nobody has any idea what could be wrong? Rating: 0 Quick Edit Full Edit

	December 14th 2008 at 12:49 PM Post #3
	440_jag 450 horse ditch bannger 1488 Posts Group: Members Member Since: July 30th 2007 Location: Galesville, wisconsin, USA Current Sled: 2002 zr 500 cce 2008-2009 Miles: 500
	i think 420s are a bit stout for a 600. i think you need to be at like a 380 or something like that. Well the plugs should be wet but if there soaking it shouldn't run all that well. Sounds like something is f*cked up 2002 Zr 500 CCE D&D pipe ported polished y 6 inch riser Acerbis Handguards Chrome winshield Pro-glider Rack Rsi pad Ripped graphics Fox snow pro shocks clickers Rating: 0 Quick Edit Full Edit

	December 14th 2008 at 1:16 PM Post #4
	big113 xracer 20 Posts Group: Members Member Since: September 25th 2008 Location: Sauk Centre, Minnesota Current Sled: 05 IQR
	thanks for the feed back Rating: 0 Quick Edit Full Edit

	December 14th 2008 at 5:11 PM Post #5
	big113 xracer 20 Posts Group: Members Member Since: September 25th 2008 Location: Sauk Centre, Minnesota Current Sled: 05 IQR
	does anyone think by chance my temp sensor might be bad tell the motor its running hot hense running ****ty and backfiring? Rating: 0 Quick Edit Full Edit

	December 14th 2008 at 9:31 PM Post #6
	440_jag 450 horse ditch bannger 1488 Posts Group: Members Member Since: July 30th 2007 Location: Galesville, wisconsin, USA Current Sled: 2002 zr 500 cce 2008-2009 Miles: 500
	well if there an excess amount of fuel it will build up in the exhaust and back fire 2002 Zr 500 CCE D&D pipe ported polished y 6 inch riser Acerbis Handguards Chrome winshield Pro-glider Rack Rsi pad Ripped graphics Fox snow pro shocks clickers Rating: 0 Quick Edit Full Edit

	December 15th 2008 at 2:46 PM Post #7
	SnowmobileAddict The Blizzard Man 248 Posts Group: Members Member Since: October 21st 2005 Location: Cedarburg, WI, USA Current Sled: 2001 Formula Deluxe 600 2008-2009 Miles: 1487
	Rich conditon can cause backfire through the pipe. Lean condition can cause backfire through the carbs. Ignition Timing can cause both. www.Monticellosnomobileclub.org Rating: 0 Quick Edit Full Edit

	December 16th 2008 at 9:22 PM  [ Modified December 16th 2008 at 9:23 PM ] Post #8
	big113 xracer 20 Posts Group: Members Member Since: September 25th 2008 Location: Sauk Centre, Minnesota Current Sled: 05 IQR
	Quote originally posted by SnowmobileAddict Rich conditon can cause backfire through the pipe. Lean condition can cause backfire through the carbs. Ignition Timing can cause both. im pretty sure i got it i replaced the coolant sensor and seems to be running good knock on wood thanks for the suggestion everyone Rating: 0 Quick Edit Full Edit