Yup, that's a main jet issue for sure. Take it out and when it starts to do the bogging thing, shut it right off, pull over and pull the spark plug. If it's white, you have one of 2 problems. Either a plugged main jet, or an air leak somewhere.
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First Chinabike: 2006 Roketa RSX200E
Current Chinabikes: 2023 Titan DLX & 2022 Lifan KP Mini w/ 210cc BRT kit, 22 RWHP!
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