Whether replacing worn out OEM manifolds or adapting new carburetors to your project, using genuine Mikuni manifolds ensures a tight leak free fit and years of durability.  They're constructed of a rubber polymer that remains pliable in cold weather and after many years of use.  Uv resistance means they won't crack or deteriorate in sunny climates.  Whether replacing worn out OEM manifolds or adapting new carburetors to your project, using genuine Mikuni manifolds ensures a tight leak free fit and years of durability.  They're constructed of a rubber polymer that remains pliable in cold weather and after many years of use.  UV resistance means they won't crack or deteriorate in sunny climates.  These holders are specially modified by The Power-Barn to fit the Honda CB350's and 450's with a 63mm mounting bolt to bolt center dimension.  Always check dimensions before ordering.

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The carburetor holders from Mikuni have the following dimensions, use the chart below for reference:

• Mounting bolt centers = 61 - 63.5mm
• Inner diameter = 40mm
• Flange throat depth = 25mm
• Typical carb sizes = 28-34mm (measured by the carburetor spigot ID)
• Mounting bolt hole diameter = 8.5mm