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520 vs 525 compression ratio?

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can I put a 520 piston in my 525 sx to lower the compression ratio? it is harerd to keep it from stalling when in tight trails compared to my friends 2001 520sx

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The compression ratio is the same in both motors 11:1 You'll need to add weight to the crank to stop the stalling I have 2 different weights avalible if your interested. I'm guessing you have an '03? They have 40oz less crankweight than the 520's had.

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I all ready have the 4k3a stator & flywheel , so all I need to do is get a crank out of a 520 and then it will be basically the same then?

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