Motorcycle 12MM Rear Disc Hydraulic Brake Master Cylinder Caliper Assembly For 70cc 90cc 110cc 125cc 140cc 200cc Dirt Pit Bike Description: -- -- Material: Metal -- Color: As picture -- Quantity: 1 pc -- Size: Brake Cylinder Mounting Hole Distance: 42-50mm / 1.65-1.97"" Brake Oil Pipe Size: 500mm / 19.68"" hole diameter:79mm/3.11"" Mount axle hole:12mm/0.47"" Banjo Bolt Size: M10X1.25. Fitment: For 50cc 70cc 90cc 110cc 125cc 140cc 150cc Pit Dirt Bike and other chinese brand ,Such as SSR,Taotao,Coolster,Roketa,Apollo,SDG,Stomp Demon X, WPB, Orion, M2R, Lucky MX, Thumpstar, Explorer, Braaap, Atomik, Pitpro, Pitster Pro, DHZ, Piranha YCF,IMR,x-pro,Baja,Motovox,TTR,BSE,Kayo,DHZ,GPX,Braaap,Lifan,YX,Ect Compatible with dirt pit bikes with 70cc to 200cc engines and a 12mm rear wheel shaft. It has a 1.57 brake cylinder mounting hole and 3" caliper long hole diameter. NOT fit 15mm Rear Wheel Shaft Bikes. Note Fit 12mm Wheel Shaft: Please note there are 2 sizes of rear wheel shaft, 12mm or 15mm, this brake assy is for 12mm wheel shaft, please check and confirm before purchasing. Please check carefully the item pictures, model and size before purchasing. Or leave us messages for assistance if you are not sure about the fitment. Package Included: 1 x Rear Foot Disc Brake Master Cylinder Assembly (Brake pads included)+ 1 Pair Extra Spare Brake Pads