Rejoin the VOC NOW and get the benefit of full access to the technical data now. May be a great help with your restoration work - will also get you a discount on parts from the VOC Spares Co. who can supply the correct parts.Thanks guys.I will rejoin when bikes finished.
Ok I purchased a 1/4 bsp.I was puzzled why it was different size.Then I just saw this in listing on ebay
Please note this assembly uses an M14 diameter banjo and the Bolt is stepped to 1/4BSP so the Bolt will not fit a normal BSP Banjo
Measuring the internal diameter of ORIGINAL banjo is .523 inch(13.29mm) The replacement is .577inch(14.66mm) therefore, there is some play when using original Vincent Banjo bolt!