Add a crankshaft position sensor to your engine with our laser cut 36-1 crank trigger wheel. This trigger wheel is 100mm in diameter and 4mm thick, with a 12mm diameter center hole (with plenty of room to enlarge it for larger crank bolts) and eight radial locating slots 8mm wide. The teeth are 6mm high, so this fits crankshaft pulleys up to 90mm in diameter. It also has a balance hole in it for smooth balanced rotation. We designed this wheel for engines with unusually small trigger wheels where our 180mm wheel would be too large.  Also perfect for a motorcycle.