you can make one O'reily's has most of the parts if you got one around you(shreader valve, airtank valve with gauge, fitting, and rubber engine water plug about 1in) pvc I got from hardware store ( 1in to 1/2 inch threaded). around 20 some bucks for all. use a bike pump to pressurize it when you got the motor plug in the exhaust port and the tester on the intake boot. don't go over 20 psi, it should hold pressure for a min or two.