The typical list of things to check will be as follows:
- if the OEM air box is still in place check for cracks around the part that feeds the carbs. The rubber there has a tendency to deteriorate.
- Squirrel condoms (vaccum caps). There are four possible locations and all are at the carb intakes. Two on carbs and two on intake manifolds, one on each side. You may have a vacuums hose on one or two. Mine use Magnums
- HIdden fuel filter - its between the carbs at the "T" on the bottom fuel inlet.
- If the caps have been opened up for some reason (usually to swap needles or add/remove shims) the rubber gasket could be pinched of damaged. Check under the silver caps at the top of the carbs.
- Next step is no fun but float levels (check the tech vault for correct level and how to measure).
- If the carbs have been rejetted theres a possibility an O ring is pinched or missing from the air screws.
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