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I’m wondering if anyone knows if the engine on the Scrambler and Sportsman XP 1000 fits on the Sportman 850 XP? It looks very similar when looking at the oem parts fiche.

I’m asking this since after bringing my 2011 Sportsman 850 XP to Polaris because it was burning lots of oil I just found out that the whole top end of the motor needs to be changed and it will cost about 3000$ for them to do it. So I was thinking of doing it myself and maybe putting a whole new motor if I can find one for a good price, And if I’m doing that I might as well upgrade it to the 1000 if somehow compatible. If not I may just put a big bore kit.
 

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i don't think there is really much room to bore due to them being an inline twin. as for your question about the 1000 engine, yes, it will bolt right in. the differences are only internal. you will also need to pick up a ECU from a 1000 and an exhaust to help it breathe.
 
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