Brake Master Cylinder for the Hammerhead 80T. 
Brake Master Cylinder for the Hammerhead MudHead
Brake Master Cylinder for Trailmaster Mid-karts
Brake Master Cylinder for American Sportworks Mid-size karts

This is a complete master cylinder that is used on Hammerhead 80T and Mudhead, TrailMaster Mid go-karts as well as mid size American Sportworks and many other Chinese brands. 

This master cylinder has one port for the rear brake caliper. 

Overall length of the base is 4 1/4" the mounting bolts spacing is 1 3/4". 

Brake master cylinder assembly includes: Brake master cylinder Reservoir. Reservoir cap and cap seal

Brake Master Cylinder does NOT come with a brake switch 

Hammerhead Part # 6.000.305

American SportWorks part # 14744 

Trailmaster part # 6000305080G000