I replaced my fork oil with 10w oil @JerryHawk250's recommendation. I did it early on since I felt the forks compressed excessively under hard breaking and it did seem to make a difference. I did remove both forks to pour the oil out from the top and replaced it with the same amount I removed from each fork leg. Are you wanting to change the oil because you have 10k miles or because you want to change the ride quality?
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2022 Lifan KPX 250
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