• Triumph 350, 500 or 650 unit twin has a primary cover that features the
  removable rotor inspection cover for strobe timing but does not have the
  pointer then this adapter is what you need.
• Features＂C＂and＂B＂marks to properly time＂C＂range Triumph models (350 / 500)
  and ＂B＂range Triumph (650) models from approx 1968 and on.
• Ideal tool to fit in place of rotor inspection cover to accurate strobe timing of engine.
 

• Triumph 350, 500 or 650 unit twin has a primary cover that features the
  removable rotor inspection cover for strobe timing but does not have the
  pointer then this adapter is what you need.
• Features＂C＂and＂B＂marks to properly time＂C＂range Triumph models (350 / 500)
  and ＂B＂range Triumph (650) models from approx 1968 and on.
• Ideal tool to fit in place of rotor inspection cover to accurate strobe timing of engine.