Universal Parts Countershaft Gear $25.99 Quantity discounts available QuantityPrice SKU: 151-54 This item is IN STOCKCurrent Stock: 13 Quantity -+ Add to Cart Details Specs Number of Teeth (large gear): 52 Number of Teeth (small gear): 15 Overall Length: 57mm Supported Models QMB139 50cc/49cc , Various unlisted makes/models DetailsSpecsSupported Models Back Universal Parts Countershaft Reduction Gear for 50cc 4-stroke QMB139 engines. Back Number of Teeth (large gear): 52Number of Teeth (small gear): 15Overall Length: 57mm Back QMB139 50cc/49cc , Various unlisted makes/models