Lucas Type U39 "Long Knob" Lighting Switch (1) 31315 New OEM part number is 97-4112

OEM part number is 97-4112 and H4112

AJS and other applications (universal) that have 5/16" or 8mm valve guides

and Grant rings are one of the best quality items that you can install in your vintage BSA

Did your Tachometer Gauge Fail

9" eye to eye

Lucas Type U39 "Long Knob" Lighting Switch (1) 31315 New OEM part number is 97-4112Brand Spankin' New Top Quality Lucas Type Head Light U39 "Long Knob" Lighting Switch. We are absolutely Blown away by the Quality of this New Reproduction Part! Looks almost Identical to the Original types! Keep in mind that this Switch is far more Affordable then an Original Lucas Switch but without Sacrificing Quality! Your saving upwards of $100+! Comes with the Correct Mounting Wire, Long Knob & Sealing O Ring to keep water & debris out your