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losing power

  1. After market oil cooler. Is it worth it?

    Grom Performance
    I'm running a 125cc grom. I don't plan to big bore at all. So would the oil cooler be worth it? I run the bike hard through some canyons and around town. The rpms I hit are around 7-8rpm at times, and I notice that overtime the engine is losing power. I figure it has to be the oil temp that's...
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