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rebuild for 03 525

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Hey I am rebuilding my 2003 525exc do you guys have any suggestions on what kind of piston kit to buy? Should I go with a Weisco piston kit or should I go with the stock oem piston kit?

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KTM OEM is high quality. I would use the OE piston. But I don't have personal experience with any other brand.

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I have used wiseco in 2 strokes and cars and they are high quality and cheap. I don't see why the KTM ones would be any different. When I go to rebuild my 525 I plan to use wiseco.

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KTM oem is pretty much the best there is, but some aftermarket pistons are not bad either. Mostly they're just different. KTM oem has very thick and long lasting rings and one piece oil ring which I've never seen with aftermarket pistons.

I'm pretty sure the stock piston (rings) will simply last longer than any aftermarket, but it still doesn't justify the price difference unless you plan to run it without a rebuild for more than 200 hours.

e: i've never seen a vortex ktm piston though, does ktm use them as oem pistons?

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