D.I.Y. 2-Stroke Leak Down Tester – Tool Reviews

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D.I.Y Leak Down Tester - Featured
D.I.Y Leak Down Tester - Featured

This Is My DIY 2-Stroke Leak Down Tester.

My Home Made Leak Down Tester
My Home-Made Leak Down Tester

It may be ugly, but my leak-down tester costs only $25, and it does the job.

I found all the parts I needed at my local hardware store except for the one-way valve, which I had to special order, and the exhaust plug, which I had to get at a parts store.

Your leak-down tester needs an area Schrader valve, pressure gauge, and one-way valve.

I used small plumbing fittings, but anything from PVC to cast iron will work, so you can build yours with whatever you can find.

Here is the complete list of the parts I used, from the valve to the carburetor coupler.

Related: If you can make this tester, you can easily make this balance board and dramatically improve your riding!

Parts List: (All parts NPT (National Pipe Thread))

  • ⅛” Air Valve
  • ¼” to ⅛” Reducer
  • ¼” Male to Male Connector
  • ¼” One-way valve – Special Order
  • ¼” Male to Male Connector
  • ¼” Tee
  • ¼” Pressure Gauge
  • ¼” Male to Male Connector
  • ¼ to ⅜” Reducer
  • ⅜” Male to Male connector
  • ⅜” to ½” Reducer
  • ½” Male to Male Connector
  • ½” Female to Male Elbow
  • 1-1/4” x ½” PVC Bushing
  • Electrical Tape

If you need parts and tools, make sure to buy them here! → https://amzn.to/3CmHY7u

At the end of the day, it doesn’t matter how long your tester is or what it’s made of if it works.

When assembling your tester, you need to seal the connections with Teflon tape. The trick with Teflon tape is finding the sweet spot between too little and too much tape.

Too little tape and you won’t get a good seal; too much tape and you risk peeling it off during installation, resulting in a bad seal.

On the carburetor side, use electrical tape to build up a lip at the end of the PVC bushing. This tape lip will give the boot clamp something to hold on to during testing.

You will also need an essential bicycle pump. The smaller, the better because you only need 7 PSI to test your gaskets and seals.

Please let me know if you have any questions about building your leak-down tester.

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