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The compression ratio for a Polaris 400cc engine typically ranges from 10:1 to 12:1, depending on the specific model and year. It's essential to consult the owner's manual or manufacturer's specifications for the exact compression requirements for your particular engine. Maintaining proper compression is crucial for optimal performance and efficiency. If you're experiencing issues, it may be advisable to check the engine's compression with a gauge.

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1mo ago

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