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Discussion Starter · #1 ·
I have a 88-89 Honda trx300d 2wd. It was running fine a few months ago. It’s one of my “loner” bikes. One I let me friends use. Started playing with it and and figured I’d put a snorkel on it but my friends are careless and I wanna protect my motor. So I’m using 1 1/2 flex pvc to pull it from the air box to the front. While doing so I figured I’d tune the carb for the new airflow. What I wanted to know is the main jet size. I think it a 130 but I’m not completely sure. I can’t seem to find the specs anywhere so I figured some of you guys may know. I’m thinking I can’t just adjust my f/a screw to 2.5 out and drop the needle to the top notch and it should run okay. The frame tube that feed the air box previously is around the same inside diameter so I don’t think I have to mess around with much. Thoughts?


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