Main jet for Dellorto carburetor M6mm 100
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For all Dellorto carburettors from 17.5 to 24 mm. When tuning the engine, always install an oversized main jet. At full throttle the engine should start to stutter (4-strokes). Now you should jet down in increments of 5 until the engine runs smoothly. IMPORTANT: If the main jet is too small, the engine will run too lean, which can cause the engine to seize.