27MM MAGNETO FLYWHEEL PULLER REPAIR TOOL, FOR GY6 125cc 150cc YAMAHA SCOOTER ATV DIRT BIKE FLYWHEEL PULLER 27MM x 1.0 LEFT HAND THREAD Threads size inside of the engine part (Outside male threads on tool) Fits most late-model MX bikes Fits CR80R/125R/250R/450R/480R/500R, XL80/100/100S/170, XR100/100R, XR50/CRF50 00-04, FL250, ATC70/110 (CDI ONLY), ATC185/ 250R, TRX250R 86-89, TRX90 93-00, TRX70/125 & EARLY 50cc