Custom builds up to 1200cc

See related products below for a Right side relief model

These are correct for all BSA A50 and A65 models

NOTE: If your motorcycle has removable bar clamps and the top tree accepts 1/2-inch O

Main Jet 170 for Concentric or Monobloc Carbs Vendor_Spectro Oil Custom builds up to 1200ccThese replacement main jets for your Amal carburetor come right from the factory, don't be fooled by substandard knockoffs that are out on the market! Use these to tune in your carb by either increasing or decreasing your main jet size, which affects the flow of gas into your carb once you start using the throttle. Refer to your manual for further jetting and tuning information. Sold Individually.