How to fine-tune your jetting: Difference between revisions
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Remove the black covers on the top of the carbs. The screws have different lengths, so keep track of which one goes where. The plastic vacuum pistons are held under pressure by a spring, so be careful when removing the top. | Remove the black covers on the top of the carbs. The screws have different lengths, so keep track of which one goes where. The plastic vacuum pistons are held under pressure by a spring, so be careful when removing the top. | ||
Carefully pull the vacuum diaphragm/piston unit out. The rubber diaphragm is the most delicate part of the carb | Carefully pull the vacuum diaphragm/piston unit out. The rubber diaphragm is the most delicate part of the carb and is easily damaged. | ||
Shake the needle out, raise it with (however many) [[Washers for carb needles|2.5 or 3 mm washers]]. | Shake the needle out, raise it with (however many) [[Washers for carb needles|2.5 or 3 mm washers]]. | ||
If you're using aftermarket needles, start with the clip in the 3rd position (middle). This is usually for a stock or mildly modified setup, such as a slip-on exhaust. You can use washers to make "half" steps, too, for super-fine tuning. | |||
Reassemble. | Reassemble. | ||