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Definitely, the bottom end of your crankcase with a 2 stroke engine will have fuel, oil, air sucking in and out of it if your rings are still good. I'd pull your heads and check it out, I've also heard that polaris put out a lot of bad crankshafts between 2001 and 2003 on 800s. Hopefully this isn't the case or it's gonna get expensive. I'd check out your crankshaft and if you've got a bad bearing in there or anything looks off, try sending it out to SLP for the tough boy bearing kit. I haven't had to do this but it's around $100 for the whole deal and doesn't seem like a bad option, plus for an extra $50 they'll true your crankshaft. I'm not the greatest fan of SLP because of their lack of technical support for their products, but from what I hear their machine services are pretty good.
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