Universal Hydraulic Brake Master Cylinder Reservoir Oil Cup for 90cc 110cc 125cc 200cc 250cc 300cc Go Kart Buggies This is a brand new universal oil reservoir. Works for the hydraulic brake master cylinders that used on most 90cc -300cc go karts and buggies Mounting hole diameter: 26 mm This reservoir might not be identical to your stock one, but if it could be mounted to your bike, and fits the hose, it will work like the OEM one.