Ideal for Motovox MBX10, MBX11, & MBX12 models Economical replacement Strong metal housing Fits many 97cc 2.8 hp, 4-stroke engines This pull start is compatible with Motovox go-karts, and mini bikes like the MBX10, MBX11, and MBX12 In addition, this popular pull start will work on most other mini bikes factory equipped with 80cc or 97cc 2.8 horsepower (hp) 4-stroke engines. This pull start is compatible with Motovox go-karts, and mini bikes like the MBX10, MBX11, and MBX12. In addition, this popular pull start will work on most other mini bikes factory equipped with 80cc or 97cc 2.8 horsepower (hp) 4-stroke engines. Specifications Overall diameter: 6″ (152 mm) Mounting Holes: 6 Mounting Hole Distance (Adjacent): 2-5/8″ (67 mm) Mounting Hole Distance (Across): 5-1/4″ (134 mm)