Brand: AIM Sports
This special trigger collar is designed to fit the 0.75" OD jackshaft of the Briggs & Stratton engine used in Junior Dragsters. It is sized to be slipped over the jackshaft and held in place with a setscrew (included). A single trigger magnet is embedded in the collar.
Add your AiM Magnetic Speed Sensor, Part No. MC-145 (sold separately) to log jackshaft speed on your MyChron3-660 or MyChron4-660 dash.