X-PRO^® 19 Tooth 428 Chain Front Engine Sprocket for GY6 150cc ATV Go Kart
[253-999015]

My Son and I are putting a GY6 on a Ty Rail 2 seat so nothing to compare to. HAD to have a sprocket but which to order was the problem. The pics with a caliper was exactly what was needed. We got it in 3 days!! It fits perfectly. Good quality and FAST service.
WTG MPM!!!
THANK YOU!!