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98 polaris indy 500 wont start, i pulled it over cold and it popped a bang like backfire

Last year i totally rebuilt engine. weisco pistons,rings, new crank,rods,bearings,seals,gaskets(a professional put it all together) not alot of snow last year. but ran great for 300 miles. over summer water and mouse got in air box. cleaned it out, and carbs. drained water out of bottom of motor. oiled really good. it ran good for 100 miles.now i pull and pull and doesnt start good. i smell gas but it doesnt seem to pop off and go?????????

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6ya6ya
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Posted on Jan 02, 2017

hotrodtod38
  • 141 Answers

SOURCE: polaris 500 xc backfiring through carbs, running on 1 cylinder

timing or cam

Posted on Feb 15, 2009

  • 35 Answers

SOURCE: I have 95 xcr polaris triple,upon starting it revs

turn the idle speed screw to the left about 2 full turns on all carbs, see where that gets you

Posted on Feb 19, 2010

  • 46 Answers

SOURCE: I have a 2000 polaris

I WOULD DO I COMPRESSION CHECK ON THE CYLINDERS, THEY SHOULD BE SOMEWHERE AROUND 100-130 PSI WITH A DIFFERENCE OF NO MORE THAN 15% BETWEEN CYLINDERS

Posted on Jan 06, 2011

leighp123
  • 1669 Answers

SOURCE: 98 indy 500 I pull it over cold and it backfired, and wont start

It sounds like some of that water turned to steam in the engine and the pressure of the steam did some damage. Check out the timing chain and the timing mark alignment. Check out the valve condition...there might be some chipped or cracked valves...yikes!

Posted on Jan 20, 2013

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