We strongly suggest comparing the posted picture to the unit(s) that needs to be replaced.
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Used on: YAMAHA MOTO-4 350 YFM350 1987-1990 1992-1995 Dimensions: Inside Diameter of Manifold Intake: 35.8 mm / 1.40 inch External Diameter of Air Intake: 50.3 mm / 1.98 inch