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Discussion Starter #1
ive been dumping some money into my 2005 polaris 600 switchback, ive bough a new mbrp standard silencer for it, and new slp air horn intake kit for my air box, and some vforce 3 reeds, the only thing that said required rejetting was the air box....but since there all working in sync(in a way) because there all freeing up air flow, wat should i do for rejetting so i dont burn a piston?the air box kit said go up 2, but since my carbs are running a little on the rich side anyhow im not sure wat i should jump up to?? Any suggestions are welcome please and thank u!!

ryan cannon
 

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Discussion Starter #3
I would go up the two sizes and tune from there. Most likely it will be rich, but I would rather err toward the rich side than the lean.[/b]
good call, rather run a lil rich then burn a piston,
 

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id just check your plugs as you ride some and tune from there or get a templa flow or ad dial a jet.
 

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if you run in 10 degrees and warmer factory is 2 sizes rich anyway. id just leave the jetting as it sits. but i also know what a lean motor sounds and acts like.
 

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I'd say some testing is in order. Thinking a jetting change prior to testing might/should depend on the temps when the testing is done? As Tifa mentions, the jetting is a little on the fat side from the factory - as long as you aren't testing at -25f.......
 

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They always run AWESOME just before the hole appears in the piston... jet rich, work your way to lean. Jets are cheap.
 
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