Triumph Racing Primary Crankcase Breather Stub By CBS Specs:1" X 16 TPI UK Made Triumph Crankcase Front

UK Made Triumph Crankcase Front Breather Vent Pipe

* New UK Made Triumph 350 & 500 Unit Twins Kickstart Return Spring Plate

Trophy & TR6C) from 1968-1970 only

*****Please note that this Switch will also fit other British Motorcycle models that are not listed abouve

Triumph Racing Primary Crankcase Breather Stub By CBS Specs:1" X 16 TPI UK Made Triumph Crankcase FrontA popular racing mod back in the day on pre 1970 Triumph 350, 500 and 650 unit twins was to allow the engine to breathe through the primary side case. Models from 1970 and on already featured this design however, pre 1970 models did not. If your engine features the timed inlet cam breather and you would like the engine to breathe through the primary you would have to drill (3) small holes near the bearing housing I won't get into detail regarding the