GOOFIT 52.4mm Cylinder Head Assembly for 4 Stroke 110cc ATV Go Kart Scooter Bore: 52.4mm (about 2.06'') This item fits for 110cc Chinese ATV Go Karts scooter engine Blot hole spacing(A):1.74" ; Blot hole spacing(B):2.00" ; Blot hole spacing(C):1.87" ; Diameter(D):2.06" ; Blot hole spacing(E):2.00" ; Blot hole spacing(F):2.00" ; Blot hole spacing(G):1.83" ; Blot hole spacing(H):1.83" ; Arrival within 1-2 days (Sold by GOOFIT and Fulfilled by Amazon) Arrival within 7-15 days (Ships from and sold by GOOFIT)