Hoca QMB139 Engine Gear Sets, Part #169-206

Hoca Gear Sets in a variety of combinations for QMB139 50cc, 4-stroke engines. Choose from 16, 17 & 18 Front Tooth combinations and 41, 42 & 46 Rear Tooth combinations. Small Gear. Overall Length: 56.7mm Large Gear. Number of Splines: 19 Inner Diameter (splines peak to peak): 18mm Thickness: 15.5mm.