2012 400 Sportsman Top End Rebuild - Polaris ATV Forum
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post #1 of 3 (permalink) Old 10-06-2016, 12:06 PM Thread Starter
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2012 400 Sportsman Top End Rebuild

Hi everyone have to rebuild the topend of my sons 400 (455) Sportsman MUD BOG RACER I'm going to bore it so what brand of piston is best suited for this engine it runs at 6500-7000 RPM is there one better for running at that RPM than another,if so which brand. Thanks in Advance.
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post #2 of 3 (permalink) Old 10-06-2016, 03:21 PM
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Here you go...

"Still can't beat a Wiseco forged piston for the bucks. Only piston I think is actually stronger is an Elco made in Austria forged piston used in some Rotax and Ktm dirt and street machines.Never checked to see if you could get one for a Polaris atv."
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post #3 of 3 (permalink) Old 09-22-2018, 05:32 PM
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Hi i like the weisco teflon stuff coated,iv had really good luck with them. Good luck
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